The Pedestrian's Record

48 the pedestrian's record. training must not have his mind disturbed ; he should always feel at ease, and enter into all harmless pleasures calculated to give tone and energy to the body. As foods both form and build up the human fabric it will be wise to recognize that man " is wonderfully and fearfully made," that tissues are most delicately composed and arranged in such a manner so as to afford ample protection to them from injury and facilitate the operation of their various functions. This magnificent machinery of the human body cannot operate successfully without that reno­ vation which food alone can supply, and in consider­ ing this matter we must know first the composition of the body before administering to its pabular wants. Fortunately, man has been so carefully analyzed by his fellow man, that the composition of every tissue and structure of his body can be demonstrated to the fraction of a grain ; thus, for example, 100 parts of blood contain 79 of water, of albumen 7, and of colouring and other matters 14; and these com­ pounds, like others in all animal bodies, can be reduced to their ultimate elements, which, according to our present chemical knowledge,cannot be renderedfurther divisible ; for example, gold, sulphur, and oxygen gas are elementary substances, and cannot be sepa­ rated into anything else, but water exists as a com­ bination of two gases, viz.,oxygen and hydrogen, and these can be separated the one from the other by chemical aid. These elementsunite the one with the other in various proportions to form compounds, and