Should the author's little vessel, with its humble freight of science, meet with the approbation of his good friends, the boys and their advisers, another and another, if health permits, shall be launched for their benefit. Vale.
THE END.
Transcriber's Notes.
Chapter XV. Experiment one is not indicated by a title heading.
Page 99. "the pulse is raised forty or fifty beats per second" changed to "the pulse is raised forty or fifty beats per minute"
Page 148. "it is allowed to dry spontaneously, and being coated with amber varnish (a solution of amber in chloroform) is now ready to print from. (Fig. 123.) It is, perhaps, hardly necessary to add, that the sensitizing and developing processes must be performed in a dark room." Fig. 123. is irrelevant to this section. The reference has been deleted.
Page 365. "an air thermometer has been employed by Sir John Leslie, under the name of the "Differential Thermometer," in his refined and delicate experiments with heat. (Fig. 401.)" Ref. to (Fig. 401.) removed. Fig. 401. not in original hard copy version.