xxii CONTENTS 



PAGES 



Data on Water . .... 489 



Rules, 489 Feet-head and pressure, 489 Pressure and feet- 

 head, 490 Equivalents for moving water, 490 Foot-loss of 

 water through pipes by gravity, 491 Friction-loss of water in 

 pipes (pounds), 492 Friction-head (feet), 493 Barometric 

 pressure at different altitudes as affecting pumps, 494. 



Windmill Figures 494 



Windmills for pumping, 494 Power of mill, 495 Speed of 

 mill, 496 Loading and speed, 497 Sizes and cost of circular 

 reservoirs for irrigation by windmills, 497 Cost of mills, 498. 



Machinery and Motors 498 



Widths of belting, 498 Size and speed of pulleys or gears, 498 

 Calculated capacity of piston pumps, 499 Power required to 

 operate triplex pumps, 500 Horse-power required to raise water 

 to different heights, 501 Horse-power of steel shafting, 501 

 Electric appliances on the farm, 502 The motor power of a 

 stream, 502 Hydraulic rams, 503 Hot-air engines, 503. 



CHAPTER XXVI 



MASON WORK. CEMENTS, PAINTS, GLUES, AND WAXES . . 504-515 



Building or Mason 1 s Cement ; Gravel and Pitch .... 504 

 Approximate estimates of mason-work, 504 Floors, borders, 

 walks, and foundations, 505. 



Mending Cements 507 



Cements for iron, 507 Boiler cements, 507 Tar cement, 508 

 Copper cement, 608 Fire-proof or stone cement, 508 

 Earthenware cement, 508 Cement for glass, 508 Sealing 

 cements, 508. 



Paints and Protective Compounds . . . . . . . 509 



Home-made washes for fences and outbuildings, 509 Fire-proof 

 paint, 509 For damp walls, 509 Water-proofing paint for 

 leather, 510 For cloth for pits and frames, 510 For paper, 

 510 To prevent metals from rusting, 510 To prevent rusting 

 of nails, hinges, etc., 510 To remove rust, 511 Amount of 

 paint required for a given surface, 511. 



Glues 511 



Liquid glue, 511 Flower gum, 511 Gum for labels and speci- 

 mens, 512. 



Waxes for Grafting and for Covering Wounds 612 



Common resin and beeswax waxes, 512 Alcoholic wax, 513 



