Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.

palpable powder of free arsenic becomes detached from the surface of the room-paper, and it is dampness that precipitates it with the dust upon all articles ; so also the moisture of the throat prevents it reaching the lungs. But may it not be that the hydrogen from the furnace, soil, or other sources, com- bining with the arsenic from the wall-paper, forms arsenical hydrogen, and so acts virulently ? for this is one of the most intensified and deadly poisons known. Therefore papers with green are to be discarded. All wall-papers should be glazed, or the walls painted. Service pipes for water should be of iron ; and he is a public benefactor who "will render iron pipes as available for the purpose as are pipes of lead. Medical Students : Our investigations in this so intensely interesting field of medical lore, must now draw to a close. Let us here congratulate ourselves, and thank God " for this day and opportunity " of seeing understanding-!// so much of this neiv phase of our noble art. I said to you in the Preface, that we were rich in the material for a systematic work of this kind, and now can say again, that we feel still burdened with the untold matter that so interests ourselves, and which we desire you should know. But the original bounds of this work are already far exceeded ; I therefore will only remind you, with a parting emphasis, of the beautiful aphorism of Dr. Althaus, (who, by the way, has written well on this subject,) that " it is not electricity that cures diseases, but the physi- cian, who may cure disease by means of electricity." In a word, it is the method and skill directing this agent, that give the success. 59