Physics and Chemistry. 49 
SCIENTIFIC INTELLIGENCE. 
I. PHysicS AND CHEMISTRY. 
gradual change of the mean diurnal position, for during two 
ward.” 
ratus proved, however, to be unsatisfactory and further modifica- 
Mons were made wich the improved apparatus; similar diurnal 
ain observed, and a similar 
Conditions, The pendulum was not sensitive to local tremors but 
lt was extraordinarily sensitive to steady forces. When a person 
Am. Jour. Sc1.—Tuirp Serres, Vou. XXIII, No. 133.—Janvary, 188. 
4 
