smaller volumes, gradually augmenting them until we feel that our chest is distended to its utmost capacity. By observing caution in all these relations we shall, if we persevere intelligently, soon begin to feel and enjoy the inestimable blessings that arise from true physical culture, and be able to accomplish feats of strength and agility of which we were before utterly incapable. And when we come to consider that the brain shares essentially and largely in the benefits arising from this culture, and that through its agency it is capable of doing more and better work than if it should be unaided by the physical training of our body generally, how important does this subject become at once. No man can perform with ease any great amount of mental labor where physical culture has been neglected, or who does not use the sponge freely and indulge daily in the proper amount of physical exercise. This, together with pure cold air as food for the lungs and suitable diet, will accomplish miracles, and tend to secure health and happiness, presuming always that our habits are temperate, and that we eschew those excesses--such as the immoderate use of wine and tobacco--of which we perceive so many victims of all ages and sexes, and which in even the healthiest constitutions sometimes sow the seeds of disease and death. It would, of course, be almost impossible to lay down rules for every case, but as a general thing the system of physical culture, as explained by me to the gentlemen referred to in my introductory notice, and of which I have given some hints here, may be followed without the slightest misgiving. Obviously, however, it must be modified to suit the years and the constitution of those subjected to it; but how young or aged soever, how delicate or robust, it can, under judicious guidance, be made to build up into perfect health and strength those who are feeble, constitutionally or otherwise, and assure and develop the muscular resources of those who are already in possession of a sound and healthy constitution. The aged also will find great benefit from it, and from a careful and gentle exercise of their muscles and the constant use of the sponge and cold water. To all of what I have hitherto observed on this subject, well ventilated residences and bedrooms must be added, as a _sine qua non_, for neither health nor strength, nor anything pertaining to true comfort, can be found in connection with badly ventilated bedrooms. The air we breath becomes impure and vitiated while being expelled from the lungs, and is utterly unfit to be inhaled again. Consequently, if through some open casement or door there is no mode of escape for it, once it has performed its mission, or no mode of ingress for fresh, pure air from without, we are, while slumbering during the silent watches of the night, not only marring the completeness and refreshing character of our repose, but actually poisoning ourselves by slow degrees. We must, therefore, never