193 Scutilific News, Accounts of Books, l^fc 



well fufed portion had no higher fpeclfic gravity than 8.3406, and he concludes from the 

 infufibility and brittlenefs of this metal, that it affords little promife of utility in the artSi 

 except in metallic alloys, or by virtue of the property which its oxide poffefles, of 

 affording fixed colours, or giving fixity to the colours of vegetables. 



The Geometrie defcript'tve of Gafpard Monge is publiftied at Paris In quarto, with 25 

 plates, by Bernard, and likewife a new edition of his Statique. 



The reference to a drawing in Mr. Crulckfliank's paper. In our prefent Number, relates 

 to a (ketch which, on account of the late reception of the copy, could not be inferted in 

 the plate. It confifts fimply of two tubes, forming what I have called the broken circuit 

 in the manner mentioned in my experiment, where a tube with water was connedled with 

 another containing marine acid, and both fet to work at the fame time. It feems very 

 probable, that a large quantity of gas might be thus extricated ; but from the circum- 

 ftanccs of the laft mentioned experiment, it feems apparent that the power of the ap- 

 paratus in each individual tube will be lefs the greater the number. 



