Preparation of Objects. 63 
and place it upon the cell slanting ways. This would drive 
out all the fluid that was not required, and the gold size would 
get through the fluid and attach the cover to the cell. When 
the cover was in its place the superfluous fluid should be 
secured by means of a brush or a damp blotting paper, and a 
little fast drying cement applied to the edge of the cell was then 
beneficial in assisting to fasten on the cover. Ina few daysa 
coating of asphalte might be applied to connect the cover glass 
to the slide, thus binding the whole firmly together, and if six 
or eight of such dressings were applied as soon as the former 
was hardened, he (Mr. Lovett) did not think there was any 
need to fear a leakage. 
Speaking upon the. question ‘of finishing, Mr. Lovett 
said that with the assistance of a turn-table a neat ring 
could be added to the slide, but the asphalte ring should not 
be ‘wider than was absolutely necessary, and might be relieved 
by a thin line of white or red. 
Mr. Lovett further gave a short description of a new form of 
“‘ objective’ lately introduced by Mr. Baker, of Holborn. The 
arrangement of the object glass is such that it can be used for 
powers varying from three to six inches. The invention is 
likely to be of service in botanical investigations. 
