INTRODUCTORY—INVENTIONS AND DISCOVERIES—THEIR DEVELOPMENT.

21:57

Read by BettyB

AGRICULTURE AND ITS IMPLEMENTS.

18:56

Read by Lynne T

AGRICULTURAL IMPLEMENTS.

15:42

Read by Rachel Tevis

AGRICULTURAL INVENTIONS.

20:34

Read by Rachel Tevis

AGRICULTURAL INVENTIONS (continued).

20:45

Read by Rachel Tevis

CHEMISTRY, MEDICINES, SURGERY, DENTISTRY.

26:52

Read by Larry Wilson

STEAM AND STEAM ENGINES.

45:13

Read by mleigh

ENGINEERING AND TRANSPORTATION.

43:21

Read by mleigh

ELECTRICITY.

33:51

Read by roselbex

ELECTRICITY continued

50:30

Read by roselbex

HOISTING, CONVEYING AND STORING.

27:56

Read by mleigh

HYDRAULICS.

35:27

Read by roselbex

PNEUMATICS AND PNEUMATIC MACHINES.

33:17

Read by roselbex

ART OF HEATING, VENTILATING, COOKING, REFRIGERATION AND LIGHTING.

34:02

Read by Beeswaxcandle

METALLURGY.

36:48

Read by Rachel Tevis

METAL WORKING.

20:07

Read by Rachel Tevis

ORDNANCE, ARMS AND EXPLOSIVES.

44:00

Read by Yi Fan

PAPER AND PRINTING.

33:19

Read by EmilyCripps

TEXTILES.

29:23

Read by Yoganandh T

GARMENTS.

28:25

Read by Cbteddy

INDUSTRIAL MACHINES.

22:50

Read by prajak

WOOD-WORKING.

28:13

Read by Mario Pineda

FURNITURE.

12:32

Read by Mario Pineda

LEATHER.

21:54

Read by roselbex

MINERALS—WELLS.

22:08

Read by jenno

HOROLOGY AND INSTRUMENTS OF PRECISION.

31:55

Read by Availle

MUSIC, ACOUSTICS, OPTICS, FINE ARTS.

35:56

Read by Beeswaxcandle

SAFES AND LOCKS.

17:27

Read by prajak

CARRYING MACHINES.

24:37

Read by mleigh

SHIPS AND SHIP-BUILDING.

25:32

Read by prajak

ILLUMINATING GAS.

15:26

Read by prajak

BRICK, POTTERY, GLASS, PLASTICS.

48:21

Read by roselbex