The engineering skill which has been applied to the design of labor-saving devices for the home has made a number of these articles equal or superior to similar articles that are regarded as standard laboratory equipment.The methods of mass production used in their manufacture have brought the cost of numerous other items so low that they can be advantageously substituted for common equipment that is only a little better for laboratory use.
The work of the chemist or the chemistry teacher is often hampered by lack of facilities for simple glass blowing. Directions are given for making severaltypes of blast burners from pipe fittings ami copper tubing at nominal cost.Other items of equipment are described, and a method of annealing finished work is given.
x + 222 pp. 1 color plate and 37 figs. 15X23 cm. $3.75. This is the most up-to-date book on a very important analytical technic which was first discovered by Tswett in 1900 but remained practically unknown for many years. Essentially, chro-
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