1006 Transactions of the American Institute. 



crystalizcd chloritlc of copper in two kilogrammes of alcohol, ami 

 with this solution to wet a pad of cotton, which is then laid on a 

 plate and burned in the center of a stable^ the heads of the animals 

 being turned toward the plate so as to breathe the fumes. This 

 operation is performed morning and evening; one pad is burned 

 for every three head of cattle. The solution is also administered 

 internally, with the addition of fifteen grammes of chloroform for 

 the above named quantity. A teaspoonful of this liquid is mixed 

 with each animal's drink three times a day. 



ELECTRICITY ON MOUNTAINS. 



The BihliotJieque Universelle contains a paper by Henri de Saus- 

 sure, describing some interesting phenomena observed by a party 

 of tourists on the summit of Piz Surley, a mountain composed of 

 crystaline rocks, in the Grisons, at an elevation of over 10,000 

 feet. The party had just laid their albenstocks against a pile of 

 dry stones which crowns the summit, and were preparing to take 

 their repast, when M. Saussure suddenly felt pains and pricking 

 sensations on various parts of his body, which soon assumed the 

 character of a burn. At the same time a sound something like 

 the vibrations of a tuning-fork came from the sticks resting against 

 the stones. They vibrated strongly in the Imnd but gave no sparks. 

 Mr. Saussure felt his hair and beard stand out, and a young French- 

 man of the party declared that he could feel his moustache growing, 

 and strong currents passing from the tips of his ears. The sensation 

 of flowing currents was experienced by all present, and was evi- 

 dently the result of electricity passing from the summit of the 

 mountain. As they descended thesq phenomena diminished, and 

 eventually ceased. The sky was cloudy, and the travelers were 

 overtaken by a storm of hail and sleet before completing their 

 descent. 



BRONZE rOWDERS. 



According to Dr. Wagner, of Germany, the usual bronze colors 

 are really metallic. Tlie metals employed are for the most part, 

 copper and zinc, which are made into an alloy and then reduced 

 into an impali^able powder. The first and most common method 

 of obtaining the pow^der is to beat the alloy into thin leaves, which 

 are rubbed with a scratch brush throucrh an iron sieve. After being 

 ground with oil, the powder is heated imtil the required tint is 

 produced. The alloy may be reduced by filing, and the sharp 

 angular particles thus formed are flattened by rollers. Dr. Wagner 



