* 43/02/02 1 For the Little World * 43/02/09 2 The Virus - Enemy of Life * 43/02/16 3 The Electric Smoke-Eater * 43/02/23 4 Laboratory Detectives * 43/03/02 5 Electronics - Part 1 * 43/03/09 6 Domestic Measures and Measuring Devices * 43/03/16 7 Telltale Atoms and the Tales They Tell * 43/03/23 8 The Principles of Electronics and Their Functions * 43/03/30 9 Steel That Floats * 43/04/06 10 Sound 43/04/13 11 Why Smash Atoms 43/04/20 12 Replies to Questions from Listeners * 43/04/27 13 Design for Substitutes 43/05/04 14 Bombs: Their Contents and Effects * 43/05/11 15 Attack by Fire 43/05/18 16 Science as a Career - Part 1 * 43/05/25 17 Science as a Career - Part 2 * 43/06/01 18 Future Power Sources - Part 1 * 43/06/08 19 Future Power Sources - Part 2 * 43/06/15 20 Today's Ben Franklin * 43/06/22 21 Engineering for Victory * 43/06/29 22 Machines that Talk * 43/07/06 23 Production Miracles * 43/07/13 24 The Stuff Our World Is Made Of * 43/07/20 25 Synthetic Rubber - Part 1 * 43/07/27 26 Synthetic Rubber - Part 2 * 43/08/03 27 Strange People of the Little Worlds - Pt 1 * 43/08/10 28 Strange People of the Little Worlds - Pt 2 * 43/08/17 29 Our Friend the Weatherman * 43/08/24 30 How Good a Scientist Are You? * 43/08/31 31 Let's Go Stargazing * 43/09/07 32 Amber and Amperes - Part 1 * 43/09/14 33 Amber and Amperes - Part 2 * 43/09/21 34 Magnetism * 43/09/28 35 The Air We Breathe * 43/10/05 36 The Earth as a Treasure Chest * 43/10/12 37 Science in Everyday Things - Part 1 * 43/10/19 38 Science in Everyday Things - Part 2 * 43/10/26 39 Sun in the Night * 43/11/02 40 Sound * 43/11/09 41 Electronics * 43/11/16 42 Glass * 43/11/23 43 Power Metallurgy - Part 1 * 43/11/30 44 Power Metallurgy - Part 2 * 43/12/07 45 Electronics for the Future - Part 1 * 43/12/14 46 Electronics for the Future - Part 2 * 43/12/21 47 Electronics at Work * 43/12/28 48 How to Get More Light for Your Money - Part 1 * 44/01/04 49 How to Get More Light for Your Money - Part 2 * 44/01/11 50 Instruments for Victory * 44/01/18 51 Story of Ignition * 44/01/25 52 Research in Post-War Planning * 44/02/01 53 ABCs of Eating Health - Part 1 * 44/02/08 54 ABCs of Eating Health - Part 2 * 44/02/15 55 Skyrockets Grow Up * 44/02/22 56 Research and Protection * 44/02/29 57 Pipelines to Fighting Power * 44/03/07 58 Electrons by the Ounce or Billions * 44/03/14 59 Sound by Wire * 44/03/21 60 The Use of Poison Gas in Warfare * 44/03/28 61 New Use for Glass in War - Part 1 * 44/04/04 62 New Use for Glass in War - Part 2 * 44/04/11 63 More Power to the Farm - Part 1 * 44/04/18 64 More Power to the Farm - Part 2 * 44/04/25 65 Wireless Power and the Sun's Rival * 44/05/02 66 Something New in X-Ray - Part 1 * 44/05/09 67 Something New in X-Ray - Part 2 * 44/05/16 68 More About Glass * 44/05/23 69 Engineering Progress * 44/05/30 70 Feeding Our Production Army - Part 1 * 44/06/06 71 Feeding Our Production Army - Part 2 * 44/06/13 72 Aircraft Electrification * 44/06/20 73 Rolling Power Plants * 44/06/27 74 Post-War Appliances * 44/07/04 75 Keeping Tabs on Temperature * 44/07/11 76 Science Versus Malaria * 44/07/18 77 Lightning Checker-Upper * 44/07/25 78 Battle Against Rust * 44/08/01 79 Engineering for the Navy * 44/08/08 80 Electronics - Past, Present and Future * 44/08/15 81 Heritage of the Soil - Part 1 * 44/08/22 82 Heritage of the Soil - Part 2 * 44/08/29 83 Aids to Aviation * 44/09/05 84 Limited Measurements * 44/09/12 85 Future Power Opportunities - Part 1 * 44/09/19 86 Future Power Opportunities - Part 2 44/09/26 87 Episode 87 44/10/03 88 Episode 88 * 44/10/10 89 America's Merchant Marine - Part 1 * 44/10/17 90 America's Merchant Marine - Part 2 * 44/10/24 91 Man's Heritage of the Skies - Part 1 * 44/10/31 92 Man's Heritage of the Skies - Part 2 44/11/07 93 Episode 93 44/11/14 94 Episode 94 * 44/11/21 95 History of First Regular Radio Broadcast * 44/11/28 96 Telegraphy 44/12/05 97 Episode 97 44/12/12 98 Episode 98 44/12/19 99 Episode 99 44/12/26 100 Episode 100 45/01/02 101 Episode 101 45/01/09 102 Episode 102 45/01/16 103 Episode 103 45/01/23 104 Episode 104 45/01/30 105 Episode 105 45/02/06 106 Episode 106 45/02/13 107 Episode 107 45/02/20 108 Episode 108 45/02/27 109 Episode 109 * 45/03/06 110 Episode 110 45/03/13 111 Episode 111 45/03/20 112 Episode 112 45/03/27 113 Episode 113 45/04/03 114 Episode 114 * 45/04/10 115 Magnesium - Glamour Metal * 45/04/17 116 New Motors for Bombers 45/04/24 117 Episode 117 45/05/01 118 Episode 118 45/05/08 119 Episode 119 45/05/15 120 Episode 120 45/05/22 121 Episode 121 45/05/29 122 Episode 122 45/06/05 123 Episode 123 45/06/12 124 Episode 124 * 45/06/19 125 Seagoing Ice Breakers * 45/06/26 126 Seagoing Life Preservers * 45/07/03 127 What's New in Synthetic Rubber? * 45/07/10 128 A New Kind of Match * 45/07/17 129 The Strange Metal - Copper - Part 1 * 45/07/24 130 The Strange Metal - Copper - Part 2 * 45/07/31 131 Air-Sea Rescue * 45/08/07 132 Sweating It Out * 45/08/14 133 Electrical Test Farm * 45/08/21 134 The Farm of Tomorrow * 45/08/28 135 Wonder Weapons * 45/09/04 136 An Insect Zoo * 45/09/11 137 Lamps for Health * 45/09/18 138 Lamps for Tomorrow * 45/09/25 139 Photographic Miracles - Part 1 * 45/10/02 140 Photographic Miracles - Part 2 * 45/10/09 141 Street Lighting * 45/10/16 142 A New Kind of Movie * 45/10/23 143 Fundamentals of Electricity * 45/10/30 144 Twenty-Five Magic Years of Radio * 45/11/06 145 Stratovision * 45/11/13 146 The Gas that Won't Burn * 45/11/20 147 New Steel Horizons * 45/11/27 148 Contributions to Victory * 45/12/04 149 Blueprint for Tomorrow * 45/12/11 150 Roentgen, the Discoverer of the X-Ray * 45/12/18 151 Wakeless Torpedoes * 45/12/25 152 The Human Side of Radar * 46/01/01 153 The Story of Paricutin * 46/01/08 154 Ethyl Gasoline * 46/01/15 155 The Story of Nylon * 46/01/22 156 The Story of Aluminum * 46/01/29 157 Nikola Tesla - Super Genius * 46/02/05 158 Michael Faraday * 46/02/12 159 The Story of Dentistry * 46/02/19 160 The Radium Hound * 46/02/26 161 Man-made Weather * 46/03/05 162 Johnny Appleby's Knot * 46/03/12 163 The Story of the Phonograph * 46/03/19 164 Food Preservation * 46/03/26 165 The Radium Hound (Same as 160) * 46/04/02 166 The Story of Fingerprinting * 46/04/09 167 Beloved Lens Maker * 46/04/16 168 Waterproofed Roads * 46/04/23 169 Ezra Cornell * 46/04/30 170 William Henry Perkin * 46/05/02 171 Transcriptions * 46/05/09 172 Wonder Worker with Plants * 46/05/16 173 George Westinghouse * 46/05/23 174 The Time Capsule * 46/05/30 175 Television * 46/06/04 176 Polarized Light * 46/06/11 177 Balloon Tires * 46/06/18 178 The Story of the Electron * 46/06/25 179 The Electron Tube * 46/07/02 180 Electronics in Communications * 46/07/09 181 Electronics in Transportation * 46/07/16 182 Electronics in Industry * 46/07/23 183 Electronics in Health and Personal Enjoyment * 46/07/30 184 King of Clocks * 46/08/06 185 The Paper Invention that Worked * 46/08/13 186 Golden Jubilee * 46/08/20 187 The First American Patent * 46/08/27 188 Typewriter History * 46/09/03 189 Science in Recreation * 46/09/10 190 The Story of Metal X * 46/09/17 191 Birth of the Balloon 46/09/21 192 Story of the English Locomotive * 46/09/28 193 Rails for America * 46/10/08 194 Dynamite * 46/10/15 195 SOFAR * 46/10/22 196 Hurricane Maker * 46/10/29 197 Oil from Shale * 46/11/05 198 The Cash Register * 46/11/12 199 Uncle Sam's Attic * 46/11/19 200 Toothpowder Mountain * 46/11/26 201 Gustaf Dahlen * 46/12/03 202 The Sting of Death * 46/12/10 203 The Dread Scourge - Typhus * 46/12/17 204 The Oil Hunter * 46/12/24 205 Burglar-Proof Lock * 46/12/31 206 Time Through the Ages * 47/01/07 207 Beauty in Clay * 47/01/14 208 Plague Conqueror * 47/01/21 209 Man of Destiny * 47/01/28 210 The Rain Wizard * 47/02/04 211 Stone that Gave Light * 47/02/11 212 The Perfect Clock * 47/02/18 213 The Golden Mold * 47/02/25 214 The Lost Chemical * 47/03/04 215 The Modern Road * 47/03/11 216 The Flight that Failed * 47/03/18 217 Science Will Out * 47/03/25 218 Power from Steam * 47/04/01 219 Boy Inventor * 47/04/08 220 The Blacksmith and the Magnet * 47/04/15 221 The Adventure of the Sunken Submarine * 47/04/22 222 The Red Plague * 47/04/29 223 The Last Continent * 47/05/06 224 The Discarded Formula * 47/05/13 225 Nicolas LeBlanc * 47/05/20 226 The Place Where Time Begins * 47/05/27 227 Shanghai Lullaby * 47/06/03 228 Man's Greatest Enemy * 47/06/10 229 The Royal Disease * 47/06/17 230 The Weaver and the Wasp * 47/06/24 231 The Missing Planets * 47/07/01 232 Otto Von Guericke * 47/07/08 233 Something New Under the Sun * 47/07/15 234 A Stone that Talked * 47/07/22 235 Killer of Pain * 47/07/29 236 The Prompt Comet * 47/08/05 237 The Cardiff Giant * 47/08/12 238 The Window in the Stomach * 47/08/19 239 King Coal's Kingdom * 47/08/26 240 The First Iceman * 47/09/02 241 The Impractical Poet * 47/09/09 242 Repeat Performance * 47/09/16 243 The Spirit of Fire * 47/09/23 244 The Ghost Pilot * 47/09/30 245 The Moving Finger * 47/10/07 246 The Long-Distance Eye * 47/10/14 247 The Piano Man * 47/10/21 248 Man of Syracuse * 47/10/28 249 The Emperor's Reward * 47/11/04 250 Hunter of Hearts * 47/11/18 251 Stone of Magic * 47/11/25 252 The Oldest Man * 47/12/02 253 The Girl Blushed Blue * 47/12/09 254 The Nineteenth Mosquito * 47/12/16 255 The Bite of Sure Death * 47/12/23 256 The Glass Sandwich * 47/12/30 257 Pictures in the Sky * 48/01/06 258 The Earth's History Book * 48/01/13 259 Man on the Half-Cent Stamp * 48/01/20 260 Checkmate for Dr. Cartwright * 48/01/27 261 The Beginning of Braille * 48/02/03 262 The Man Who Hated Fame * 48/02/10 263 Dr. Dinosaur 48/02/17 264 The Underwater Cigar * 48/02/24 265 The Underwater Cigar * 48/03/02 266 The First Automobile * 48/03/10 267 The Magic Cupboard * 48/03/17 268 The Day of Two Noons * 48/03/24 269 Christopher's Mistake * 48/03/31 270 The Master Builder * 48/04/06 271 The Queen Wanted to Live * 48/04/13 272 The Man Who Made Ivory * 48/04/20 273 The Benevolent Tyrant * 48/04/27 274 The Man Who Ended War * 48/05/04 275 Success Story * 48/05/11 276 Antonio Stradivari * 48/05/18 277 The Wright Brothers * 48/05/25 278 The Scientific Accident * 48/06/01 279 The Man Who Couldn't Keep Still * 48/06/08 280 The Successful Failure * 48/06/15 281 The Cow that Stopped Plague * 48/06/22 282 The Broken Mirror * 48/06/29 283 Billion-Dollar Wager * 48/07/06 284 One Speed Ahead * 48/07/13 285 The Modern Viking * 48/07/20 286 Demon of Devonshire * 48/07/27 287 When Time Was Money * 48/08/03 288 The One-Man Air Force * 48/08/10 289 The Kentucky Rifle * 48/08/17 290 Lady with a Lamp * 48/08/24 291 Golden Touch * 48/08/31 292 A Tooth for a Tooth * 48/09/07 293 The Court of Death * 48/09/14 294 Man of Victory * 48/09/21 295 The Pump that Didn't * 48/09/28 296 William Wouldhave * 48/10/05 297 Curiosity Has a Long Nose * 48/10/12 298 Disease Was His Namesake * 48/10/19 299 The Doctor of Boredom * 48/10/26 300 The Emperor's Favorite * 48/11/02 301 The Ship that Never Came In * 48/11/09 302 Paths of the Sea * 48/11/16 303 The Unkept Secret * 48/11/23 304 A Saga of the Far North * 48/11/30 305 Thomas Dover * 48/12/07 306 The Fluid of Life * 48/12/14 307 Jethro Tull * 48/12/21 308 The Unicorn's Horn * 48/12/28 309 Stiegel Glass * 49/01/04 310 Gotta Light? * 49/01/11 311 The Stethoscope * 49/01/18 312 John Bartham * 49/01/25 313 Temperature Normal * 49/02/01 314 Tracks in the Sky * 49/02/08 315 Sergeant and the Turtle * 49/02/15 316 The River Tamer * 49/02/22 317 The Understanding Heart * 49/03/01 318 The Balanced Wheel * 49/03/08 319 The Crusade for Purple Milk * 49/03/15 320 Giant of Antiquity * 49/03/22 321 The Davy Safety Lamp * 49/03/29 322 Queen of the Seas * 49/04/05 323 Louis Braille * 49/04/12 324 The Conestoga Wagon * 49/04/19 325 The Lost Days * 49/04/26 326 The Witches' Brew * 49/05/03 327 The Fabulous Sculptor * 49/05/10 328 The President and the Plow * 49/05/17 329 The Loudest Noise in History * 49/05/24 330 Miraculous Fluid * 49/05/31 331 Old Ironsides * 49/06/07 332 The Ten Muskets 49/06/14 333 Two Men and a Planet * 49/06/21 334 The Revengeful Man * 49/06/28 335 The Blacksmith and the Magnet (Repeat of #220) * 49/07/05 336 Elias Howe * 49/07/12 337 The Red Plague (Repeat of #222) * 49/07/19 338 A Line of Type * 49/07/26 339 Nicolas LeBlanc * 49/08/02 340 One In Sixty-Five Billion * 49/08/09 341 The Place Where Time Begins (Repeat of #226) * 49/08/16 342 A Woman's Place * 49/08/23 343 The Weaver and the Wasp (Repeat of #230) * 49/08/30 344 The Fifty-Ton Gods * 49/09/06 345 The Clumsy Kitten * 49/09/13 346 The Missing Elements * 49/09/20 347 The Tractor Needs No Roads * 49/09/27 348 The Kensington Stone * 49/10/04 349 The Lucky Pin 49/10/11 350 The Reducing Lows * 49/10/18 351 The Earthquake and the Squirrel * 49/10/25 352 The Lost Key * 49/11/01 353 An Affair of the Heart * 49/11/08 354 The Silver Dream * 49/11/15 355 Track Number One * 49/11/22 356 Barber of France * 49/11/29 357 Dutch Janitor * 49/12/06 358 Fighter of Fire * 49/12/13 359 Sister of a Star * 49/12/20 360 A Birthday Microscope * 49/12/27 361 The Forgotten Man of Hamelin * 50/01/03 362 Sir William's Rocket * 50/01/10 363 The Magic Keyboard * 50/01/17 364 The King Who Wouldn't Take a Dare * 50/01/24 365 The Prophecy of Bologna * 50/01/31 366 Road to Glory * 50/02/07 367 The Purple Vapor * 50/02/14 368 Of Silent Wings * 50/02/21 369 The Horseless Carriage * 50/02/28 370 The Eleventh Commandment * 50/03/07 371 The Peculiar Trumpet 50/03/14 372 The Marvelous Universe 50/03/21 373 The Marvelous Gravity * 50/03/28 374 The Modest Bookbinder * 50/04/04 375 Tomorrow Unlimited * 50/04/11 376 What Happened at Peshtigo? * 50/04/18 377 Perkin's Mistake * 50/04/25 378 Davy Jones Locker * 50/05/02 379 Monster of Imagination * 50/05/09 380 The Troublesome Chemist * 50/05/16 381 The Contradictory Gas * 50/05/23 382 The Mother of Invention * 50/05/30 383 The Violet and the Vacuum * 50/06/06 384 The Fabulous Feather * 50/06/13 385 Man of Steel * 50/06/20 386 For the Want of a Nail * 50/06/27 387 Joseph Swan * 50/07/04 388 Absolute Zero * 50/07/11 389 No Strings Attached * 50/07/18 390 The Story of Spectacles * 50/07/25 391 The Man Who Nursed Pigeons * 50/08/01 392 Venus and the Sailor * 50/08/15 393 The Salt of the Earth * 50/08/22 394 The Gold Seeker * 50/08/29 395 Young Man with a Dream * 50/09/05 396 The Inquisitive Vicar * 50/09/12 397 The Lonely Passenger * 50/09/19 398 Pierre Bretonneau * 50/09/26 399 The Deaf Postmaster * 50/10/03 400 The Story of Quinine * 50/10/10 401 The Inventor Who Disappeared * 50/10/17 402 Clinton's Ditch * 50/10/24 403 The Talking Soap Box * 50/10/31 404 The McCormick Reaper * 50/11/07 405 Behind the Human Eye * 50/11/14 406 The Man Who Discovered the Skeleton * 50/11/21 407 The Story of the Cracked Plate * 50/11/28 408 Cerro Bolivar * 50/12/05 409 A Headful of Steam * 50/12/12 410 Yankee Mariner * 50/12/19 411 Clang, Clang, Clang * 50/12/28 412 Han's Iron Needle * 51/01/02 413 Valley of Fire * 51/01/09 414 Treasure from the Sky * 51/01/16 415 The Slate Didn't Break * 51/01/23 416 The Colonel and the Gusher * 51/01/30 417 Afloat on a Cloud * 51/02/06 418 The Sound Heard Round the World * 51/02/13 419 The Stanley Steamer * 51/02/20 420 The Eddystone Lighthouse * 51/02/27 421 The Dandy Horse * 51/03/06 422 Wolfgang's Robot * 51/03/13 423 The Master of Munich * 51/03/20 424 Twentieth-Century Caveman * 51/03/27 425 The Porcelain Dream * 51/04/03 426 Too Good to Last * 51/04/10 427 The Man Who Shod the Wheel * 51/04/17 428 Papin and the Pressure Cooker * 51/04/24 429 Mister Charles Parson's Dream Boat * 51/05/01 430 Quiet, Please * 51/05/08 431 Penelope and the Doctor * 51/05/15 432 Wrong Road to Fame * 51/05/22 433 The Wheel of Life * 51/05/29 434 The Many-Sided Genius * 51/06/05 435 Lazy Humphrey * 51/06/12 436 The Faraway Glasses * 51/06/19 437 The Missing Reward * 51/06/26 438 The Terror of the Fathoms * 51/07/03 439 The Conqueror of Texas Cattle Fever * 51/07/10 440 Humphrey Davy's Last Laugh * 51/07/17 441 The Missing Planet * 51/07/24 442 The First Steel Plow * 51/07/31 443 The Flight to the Pole * 51/08/07 444 Five Million Dollars Deep * 51/08/14 445 Wilderness Train * 51/08/21 446 The Episode at Falling Creek * 51/08/28 447 The Flying Buzzard * 51/09/04 448 Mr Wickham Plants a Seed * 51/09/11 449 The Prison of the Dead * 51/09/18 450 The Pirates' Pit * 51/09/25 451 The Stubborn Warrior * 51/10/02 452 David and the Dirigible * 51/10/09 453 Nathan's Enigma * 51/10/16 454 The Goldsmith Who Went to War * 51/10/23 455 The Knotty Problem * 51/10/30 456 The Warning Needle * 51/11/06 457 The Lost Gold Mine * 51/11/13 458 Father Time Himself * 51/11/20 459 The Man Who Was Too Smart * 51/11/27 460 The Nine Lives of John Muir * 51/12/04 461 The Rock of the Devil * 51/12/11 462 Supermen Wanted * 51/12/18 463 A Search of the Universe * 51/12/25 464 The Mysterious Marcus * 52/01/01 465 The Welcome Light * 52/01/08 466 Sam's Secret * 52/01/15 467 A Pot of Iron * 52/01/22 468 The Missing Element * 52/01/29 469 The Unlucky Inventor * 52/02/05 470 The Fabulous Vagabond * 52/02/12 471 Claus Roemer * 52/02/19 472 The Illiterate Millwright * 52/02/26 473 The Story of Refrigeration * 52/03/04 474 Dr. Harvey Cushing * 52/03/11 475 The Man Who Erased Never * 52/03/18 476 A Better Mousetrap * 52/03/25 477 The Giant Maker * 52/04/01 478 The Earl of Stanhope * 52/04/08 479 Ernest Solvay * 52/04/15 480 Mount Pelee * 52/04/22 481 The Plague Fighters * 52/04/29 482 A Healer with Light * 52/05/06 483 Light of the Ages * 52/05/13 484 Murdock's Challenge * 52/05/20 485 The Incomparable Observer * 52/05/27 486 The Blue Bucket Mine * 52/06/06 487 The First Photographer * 52/06/10 488 The Mulberry Bush * 52/06/17 489 The Health Detective * 52/06/24 490 Antisepsis * 52/07/01 491 Slater's Secret * 52/07/08 492 The Lady Doctor * 52/07/15 493 Mister Locomotive * 52/07/22 494 The Mistaken Notion * 52/07/29 495 The Gifted Pharmacist * 52/08/05 496 The Sands of Time * 52/08/12 497 The Lucky Train Ride * 52/08/19 498 The Greatest Ship Afloat * 52/08/26 499 The Cold Fire * 52/09/02 500 The Story of Cement * 52/09/09 501 The Man Who Loved Trees * 52/09/16 502 Black Gold * 52/09/23 503 Keep in Touch * 52/09/30 504 Mover of Air * 52/10/07 505 The Man Who Hated Noise * 52/10/14 506 Over Greenland's Ice * 52/10/21 507 Are There Sea Monsters? * 52/10/28 508 Michelangelo * 52/11/04 509 The Portsmouth Giant * 52/11/11 510 The Staff of Death * 52/11/18 511 The Stourbridge Lion * 52/11/25 512 The Forgotten Manuscript * 52/12/02 513 Dr. Channing's Fire Alarm * 52/12/09 514 Dirty Hands * 52/12/16 515 A Mouse Is Saved * 52/12/23 516 A Door of Iron * 52/12/30 517 George and the Iron Monster * 53/01/06 518 From Crimson to Gold * 53/01/13 519 The Tinker's Brew * 53/01/20 520 The Iron Bowl * 53/01/27 521 The Unsolved Riddle * 53/02/03 522 The Ugly Potter * 53/02/10 523 The Troubled Inventor * 53/02/17 524 The Paper Machine * 53/02/24 525 The Forgotten Plague * 53/03/03 526 A Stubborn Man * 53/03/10 527 A Lady's Introduction * 53/03/17 528 Stones of Cape York * 53/03/24 529 Rocky Mountain Spotted Fever * 53/03/31 530 The Man Who Counted Sheep * 53/04/07 531 The World Was Patience * 53/04/14 532 The Hussar of Hellgate * 53/04/21 533 The Prisoner in the Tower * 53/04/28 534 The Man Who Changed the Earth * 53/05/05 535 The Sulfur King * 53/05/12 536 The Yankee Clipper * 53/05/19 537 Heart in the Skies * 53/05/26 538 Span of Gold * 53/06/02 539 Menachan Valley * 53/06/09 540 Death Through Misadventure * 53/06/16 541 Father of Medicine * 53/06/23 542 A Bottle of Steam * 53/06/30 543 James and His Jenny * 53/07/07 544 Soldier of the Soil * 53/07/14 545 The Mosquito Doctor * 53/07/21 546 The Spinning Barber * 53/07/28 547 Alexander the Great * 53/08/04 548 Maestro from Pawlet * 53/08/11 549 The Forgetful Shoemaker * 53/08/18 550 The Man Who Reached for the Sky * 53/08/25 551 The Automatic Chess Player * 53/09/01 552 Life in Her Hands * 53/09/08 553 The Visual Telegraph * 53/09/15 554 Rembrandt of the Sun * 53/09/22 555 Metal of Beauty * 53/09/29 556 The Queen Maker * 53/10/06 557 Test Pilot * 53/10/13 558 The Plaster Surgeon * 53/10/20 559 Magic in the Cornfield * 53/10/27 560 The Tachina Fly * 53/11/03 561 Plaything of the Sky * 53/11/10 562 Book of Fire * 53/11/17 563 The Breadfruit Tree * 53/11/24 564 The Man from Tombstone * 53/12/01 565 The Stone of Immortality * 53/12/08 566 A Trip to Nowhere * 53/12/15 567 A Piece of Ice * 53/12/22 568 Good Queen Lizzie * 53/12/29 569 The Salty Kippers * 54/01/05 570 The Throwaway Shave * 54/01/12 571 The Man Who Whittled * 54/01/19 572 The Immigrant Inventor * 54/01/26 573 The Doctor and the Druggist * 54/02/02 574 The First Lithographer * 54/02/09 575 The Clean Sweep * 54/02/16 576 The Girl Who Loved Stars * 54/02/23 577 Ears in the Sky * 54/03/02 578 The Mite and the Market Woman * 54/03/09 579 Palace on Wheels * 54/03/16 580 The Flying Teakettle * 54/03/23 581 Hollywood's Godfather * 54/03/30 582 The Practical Inventor * 54/04/06 583 The Unlucky Toolmaker * 54/04/13 584 The Magic Needle * 54/04/20 585 The Great Reindeer Plan * 54/04/27 586 The Moldy Saucer * 54/05/04 587 Sawing Off Manhattan Island * 54/05/11 588 And Then the Night * 54/05/18 589 The Trial of the Genius * 54/05/25 590 The Fight Against Fire * 54/06/01 591 The King of Ice * 54/06/08 592 I Scream, You Scream * 54/06/15 593 Yesterday's Secret Weapons * 54/06/22 594 The Man Who Found a Continent * 54/06/29 595 Maria Coventry * 54/07/06 596 A Piece of Silk * 54/07/13 597 The Most Precious Secret * 54/07/20 598 A Scratch of a Kitten * 54/07/24 599 Ferdinand the Great * 54/08/03 600 Gold in the Streets * 54/08/10 601 Murder Will Out * 54/08/17 602 Web of Dreams * 54/08/24 603 Book Farmer * 54/08/31 604 The Immortalized Inventor * 54/09/07 605 Chester's Automatic Cat * 54/09/14 606 The Recluse of Fitzroy Square * 54/09/21 607 Victory in the Desert * 54/09/28 608 Patent Number 547860 * 54/10/05 609 Death of the Dawn Man * 54/10/12 610 A Cup of Sugar * 54/10/19 611 The Fabulous Mineral * 54/10/26 612 The Blizzard of '88 * 54/11/02 613 Hairpin in the Bottle * 54/11/09 614 American's First Invention * 54/11/16 615 Fence Around America * 54/11/23 616 No Sale * 54/11/30 617 A Touch of Cologne * 54/12/07 618 The Green and the Red * 54/12/14 619 The Perpetual Discovery * 54/12/21 620 The Overlooked Housefly * 54/12/28 621 The Missing Ingredient * 55/01/04 622 Kris Kringle's Helper * 55/01/11 623 The Way of an Eagle * 55/01/18 624 The First Skyscraper * 55/01/25 625 The Million-Dollar Cabbage * 55/02/01 626 The Stamp of Approval * 55/02/08 627 Michael Saves His Breath * 55/02/15 628 Seven and a Fifth Degrees * 55/02/22 629 Throw the Oars Away * 55/03/01 630 Free as a Bird * 55/03/08 631 A Sprig of Mint