PHYSICS OF THE GLOBE. 155 



and 8 inches pressure, shows no greater discordance than be- 

 tween two standard mercurial barometers. 



Among other works relating to the Goldschmid aneroid, 

 we will note one by A. Dorna, of Turin, " L'Aneroide a vite 

 Micrometrica." He used one made by Hipp, of Neuchatel, 

 and derived very satisfactory results. 



" A Contribution to our Knowledge of the Practical Value 

 of the Naudet Aneroid in Hypsometry" is the title of a work 

 by Dr. 3VI. Schmidt, of Munich, who states that extensive in- 

 vestigations were made by him in 1873, etc., which are partly 

 reported in a work by C. Hetting, and that he hopes now to 

 further testify to the value of the instruments. His aneroids 

 were made by the firm of Naudet & Plulot; their tempera- 

 ture and pressure errors were carefully determined. The 

 error introduced by the irregular variations of the constant 

 term was only 0.11 meter in the most unfavorable case, 

 and the total uncertainty of any altitude is 0.78 meter. 



A Summary and Critical Comparison of Recent Works on 

 the Improved Aneroids is given by Ricco, in the memoirs of 

 the Italian Spectroscopical Society, February, 1877. He es- 

 pecially considers the forms known as Goldschmid's (1), with 

 lever ; (2) without lever ; (3) Weilenmann's, with micro- 

 scope ; (4) Goldschmid's self-registering; (5) Reclier's ane- 

 roid for French agricultural stations. Ricco is also the au- 

 thor of L'Aneroide Rivista, published in the Annuaire of the 

 Society of Naturalists, Modena. 



The seventh volume of the Proceedings of the Scientific 

 Association at Carlsruhe contains numerous notices of the 

 papers read before the Society during 1872 to 1875, among 

 which we notice: Jordan, on the Use of the Aneroid in Hyp- 

 sometry, especially in Southwestern Germany; and Wiener, 

 on the Radiation received by the Earth from the Sun an 

 important memoir, printed in full. 



In the "Results of Meteorological Observations in 1873 in 

 New South Wales," the Government Astronomer, H. E. Rus- 

 sell, describes his new electrical barograph. The record is 

 made of natural size, and the time-scale, as w T ell as the press- 

 ure-scale, are drawn by the instrument itself, so that the mo- 

 ments of records are not subject to any doubt, as in many self- 

 reeisterino: instruments. 



Professor Nipher, at the last meeting of the St. Louis Acad- 



