1G8 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



zation of solar heat. A work published by Mouchot, in 18C9, 

 "La Chaleur Solaire et sur Applications Industrielles," gives 

 a rather complete exhibit of all that had been done up to 

 that time in France, and some notice of the life-work of 

 Ericsson. But the Centennial Exhibition gave Ericsson him- 

 self a proper occasion to collect and review his imposing ar- 

 ray of works in this department, beginning, we believe, with 

 1825 or thereabouts. These he has published, at his own ex- 

 pense, in a luxurious work, in which he reproduces much of 

 what he has elsewhere published, and adds much more new 

 and critical matter. The work is invaluable to one who 

 would follow the author in his long career, and would under- 

 stand the merits of the questions at issue between him and 

 many other investigators. 



MOVEMENTS OF THE ATMOSPHERE. 



In a mathematical discussion of the movements of the 

 wind, M. Finger, of Vienna, finds that, in consequence of the 

 earth's rotation, any movement of air along the surface must 

 affect the barometric pressure. Easterly winds increase the 

 pressure, and westerly winds diminish it. 



Eugene Suttor, honorary engineer, of Belgium, contributes 

 to the Royal Institute of Luxemburg, vol. xvi., a memoir on 

 the Movement of Bodies on the Surface of the Earth, taking 

 into consideration the diurnal rotation of the latter. His 

 work is apparently independent of those which have been 

 published the past few years by several investigators; and 

 lie applies his formula? simply to explain the phenomena of 

 the Foucault pendulum, and the observations, by Reich, on 

 falling bodies, at Freyberg. 



An inaugural dissertation of T. Bertran, at the University 

 of Marburg, 1S76, has come to hand rather late in the day, 

 on the subject of the Motion of a Material Point, under the 

 Influence of Gravity, upon a Surface of Rotation having a 

 Vertical Axis. After the general equations of motion have 

 been given, he considers especially cylindrical, spherical, and 

 paraboloid surfaces. 



Attention should be called to an article, by J. Aitken, in 

 the Philosophical Magazine, on Rigidity produced by Cen- 

 trifugal Force. This subject has been treated of by Sir Will- 

 iam Thomson theoretically, and by Osborne and Aitken ex- 



