Be gel il 
ay: 
Scientific Intelligence. 415 
This very simple classification suggests the kindred simplicity of symbol- 
ical notation in chemical compounds. Space fails us to pursue this ques- 
Of isodynamic and heterodynamic poles—Of anomalous poles ( points 
conséquents)—Of magnetic phantoms—On the power of electro-magnets 
as affected by Ist, the elongation of the legs, 2d, the position of the 
helices, 3d, the distance between the poles—Of armatures—Of the form 
Nancy, Aug. 20, 1860. 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHYSICS. 
1. Chemical Analysis by Observations of Spectra—It is well known 
introduced into a e, possess the prop- 
erty of causing in the spectrum, certain bright lines. Bunsen and Kirch- 
of 60°, The eye-piece of one of the teles- 
late substituted having a narrow slit 
in the focus of the objective lens. The lamp is placed 
towards this mirror permits the observation of the image of a horizontal 
scale placed at a short distance. By turning the prism, the whole spec- 
trum of the flame may be made to pass by the vertical wire of the obser- 
ving telescope, and every part of the spectrum to correspond with this 
