564 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



The inhalation of ozone does not exercise any appreciable 

 action on the capillary circulation. The contractility and 

 work power of the muscles of the frog were found to be un- 

 affected bv the action of ozone. The action of this substance 

 on colored and colorless corpuscles of blood resembles that 

 produced by a weak acid. The authors stated that it would 

 be premature at this stage of the inquiry to generalize be- 

 tween physiological action, on the one hand, and the physical 

 and chemical properties of ozone. In general, it seems that 

 the destruction of life by ozone resembles that caused by an 

 atmosphere surcharged with carbonate-acid gas. 12 A, 1873, 

 IX., 104. 



AUSCULTATION OF THE CHEST FOR BRAIN DISEASE. 



Dr. Brown-Sequard has lately insisted upon the importance 

 of frequent auscultation and percussion of the chest in cases 

 of organic disease of the brain. In a communication recent- 

 ly made to the New York Academy of Medicine, he cites 

 cases occurring in animals and man, showing that injuries to 

 the brain will produce emphysema, pneumonia, and diseases 

 of the liver, stomach, and kidneys. Pneumonia is oftener 

 produced when the injury is on the right side of the brain. 

 He referred to one hundred and eighty-eight cases of tuber- 

 cle, compiled from various sources, in which the origin of the 

 disease was traced to inflammation of the brain, showing it 

 to be not of accidental occurrence. His conclusions are that 

 in animals which have received brain injury, inflammation of 

 the lungs may follow, which may cause death. In man the 

 same effect is shown by actual experiment. Human life may 

 often be saved, after injury to the brain, by early ausculta- 

 tion and percussion. 20 A, August 30, 18*74, 229. 



EFFECT OF WATER ON LEAD PIPES. 



The question whether there is danger from the use of lead 

 pipes for conducting drinking-water has again been taken 

 up, this time by Belgrand. He calculates the length of lead 

 pipe used for this purpose in Paris, and shows that the water 

 remains in contact with the lead much too short a time to be 

 acted upon. As interesting specimens, he exhibited before 

 the French Academy two pieces of lead pipe, the one laid 

 down in 1670, the other at a period somewhat later. The 



