456 Scientific Intelligence. 
the properties of the body obtained with the active chloride. 
Amylene also acts upon toluene in presence of aluminum chloride 
and gives the same identical product as the active and inactive 
amyl chlorides. The active chloride under these circumstances 
loses HCl and becomes amylene, which unites directly to produce 
tertiary isoamyltoluene. The inactive chloride not only loses HCl 
goes a molecular rearrangement to yield this body. 
From the mode of its formation its constitution is easily deduced. 
It is dimethylethylmet Imetl Bull. Soc. Ch., U, xhi, 
G. F. B. 
213, Sept., 1884. ‘ 
6. On the Electro-magnetic Rotation of the plane of polariza- 
tion of light—A. Kunprt has examined this subject with refer- 
ence to the magnetic metals in general and his conclusions are as 
follows: 
(1) The greater part of isotropic solid bodies, fluids and gases 
which have been examined turn the plane of polarization in the 
positive sense. 
(2) A strong concentrated solution of iron chloride turns it in 
the negative sense. e negative turning of other magnetic 
salts is apparent from the diminution of the positive turning of 
the medium of solution. 
(3) Oxygen turns the plane in the positive direction. 
4 e plane of polarization of light which is passed through 
iron, cobalt and nickel is tu in the positive directi 
Negative turning results from perpendicular reflection 
from an iron m le. This is true for cobalt and nickel 
Chemie, No. 10, 1884, pp. 228-252. . 7. 
7 new form of Polariscope—At a meeting of the Amer- 
. A 
ican Academy of Arts and Sciences, held in Boston, October 8, 
ment can also be used as a photometer. Lap 
8. Conductivity of Tourmaline for Heat. — Theoretical con- 
clusions have led Professor 8S. P. Thompson and Professor O. J. 
Lodge to believe that there exists in tourmaline a unilateral con- 
ductivity for heat in the direction of the principal axis, and that 
the conductivity in the direction from the analogous pole to the 
