Rack, test tube, 15-16
Radicals, io-n,^69
Rain cycle.SeeWater vapor
Ratio, 8-9
Rayon thread, making, 85
Removingstopperfrom bottle, 23
Ring support, making, 16-17
Safety rules, 26-28
Salts, 69-73
Sand, 38
.. Siphoning, 25
Soap, making, 91
Sol, 86
Solids, 44-45
Solutes, 43, 48-50
Solutions, chemistry of, 43-55
developing photographs,^83
heated, 47
saturated,^48
strength of, 75
supersaturated,^48
testing for electrolytes, 50
volume of, 75
Solvents, 43
Statistical method, 25-26
Stopper, removing from bottle, 23
Stretching glass, 22
Subscripts, 8
Suffixes,to
Sugar, test for, 59
Suspensions, 44
Symbols, chemical, 7, 10
Test tube holder, making, 15
Test tube rack, making, 15-16
Thread, making, 85
Tintype, 84
Titration,^73
Toothpaste,making, 87
Tubing, glass, 21
Upright stand, making, 16-17
Vapor.SeeWatervapor
Vegetable coloring, making, 88
Volume of solutions, 75
Water
changing hard to soft, 40, 93
chemistry of, 34-42
coagulationof, 37, 39, 45
decomposing, 34 '
distilling, 39
filtering, 36, 38
making suitable to drink, 36
Water ofhydration, 56, 57, 58
Water vapor, 33
Wire gauze pad, making, 16
Zeolite, 42