and fixed in such position at will. The whole apparatus is mounted upon a
brass telescopic draw-stand, which, by means of clamps, is attached to the
steering handle or other convenient part of the tricycle, preferably the
form made by Messrs. Rudge & Co., of Coventry, represented in the
cut.--_Photo. News._

* * * * *




A PHOTO PRINTING LIGHT.


[Illustration]

A printing frame is placed in the carrier, and exposed to the light of a
gas burner kept at a fixed distance, behind which is a spherical
reflector. The same frame may be used for other purposes.-_Photographic
News._

* * * * *




A NEW ACTINOMETER.


A selenium actinometer has been described in the _Comptes Rendus_ in a