Transcriber's Note:

The following typographical errors were corrected:

p. 10: crackng to cracking (the cracking of jars)

p. 17: 22 to 18 (see p. 18)

p. 19: 17 to 13 (see p. 13)

p. 19: 14 to 10 (See fruit pricker, p. 10.)

p. 20: 18 to 14 (The data on page 14)

p. 21: 14 to 10 (see p. 10)

p. 26: crytallize to crystallize (to crystallize in time)

Irregularity in hyphenation (e.g. jelly-making vs. jelly making) and compound words (e.g. wash boiler vs. washboiler) has not been corrected.