[1] Perspiration, it may also be noticed, regulates the temperature of the skin by evaporation. Thus on a hot day after we have cooled down from exercise we feel considerably less warm than before the exercise. “Text-book of Physiology,” Schäfer, Part I., p. 669. [2] These exercises, it may be added, bear no claim to be considered wholly original; many of them, in fact, are taken direct from other systems, especially the Macdonald Smith system, which can be heartily recommended; some few we believe are new. They are offered not as final or complete exercises, but as a selection from the best which we can give at present. Suggested improvements will be welcomed. [3] “As certain as it is that a country walk through fine scenery is more invigorating than an equal number of steps up and down a hall, so certain is it that the muscular activity of a game, accompanied by the ordinary exhilaration, invigorates more than the same amount of muscular activity in the shape of gymnastics.”--Herbert Spencer, in _Facts and Comments_. [4] “Many men are attempting to carry the diet of youth on into middle life and age, or the diet that was quite correct for an active outdoor life into a life of sedentary office work in a town; or if they fall into neither of these errors they are generally completely ignorant with regard to the relative value and importance of foods, so that they either starve themselves on vegetables or herbs containing little or no albumen, or, on the other hand, overfeed themselves....”--Dr. Alexander Haig. [5] For the question of milk-proteid in general, see _Text-book of Physiology_ (Schäfer), Vol. I., page 135. For Plasmon, Hovis, and other simple foods, see _Muscle, Brain and Diet_ (Sonnenschein & Co.). [6] Though this really belongs to the Pulse family. [7] On the part played by saliva in digestion generally see _Text-book of Physiology_ (Schäfer), Vol. I., page 342, &c. [8] On the excitation of the gastric juices by suggestion only, see Schäfer, _Text-book of Physiology_, Vol. I., page 349. [9] “The process of training that has to be undergone by athletes nowadays is reduced to hard-and-fast rules. That these rules are not so good or scientific as could be wished is a matter for regret. The work of training is left to ‘trainers,’ and they are men who, learning from their predecessors whatever facts were known to them, build up a code of rules framed largely on imperfect experience, and added on to by what they themselves have believed to be useful. Medical men of reliable knowledge and sound professional attainments have seldom lent themselves to consider seriously the subject of training, and so place the subject on a sure scientific footing.... Many a man breaks down in training from being made the subject of some imperfect or unsuitable _régime_.”--Dr. James Cantlie, in “The Book of Health.”