73 
New Microscope Lamps . 
ceive it is so shaped that the bull’s eye can be placed in any 
direction, and as near to the flame as may be desired. Mi- 
croscopists know how requisite this is when a strong light is 
required for the black ground illumination, for the polari- 
scope, or for opaque objects. 
Many microscopists have complained of difficulties in ob- 
taining and preserving good camphine. It may he purchased 
at Deanes’, the furnishing ironmongers, King William Street, 
London Bridge, in half-gallon cans. If the camphine is only 
required for one microscope lamp, its consumption will be 
slow, and its deterioration may he prevented by purchasing 
one can at a time, bottling off three pints in pint bottles well 
filled, tightly corked, and kept cork downwards in a dark 
place. The fourth pint may be put into quarter-pint stoppered 
bottles, also kept in the dark, brought into successive use, 
and replenished from a pint bottle when all are exhausted. 
By this means the spirit will keep for any time, and always 
yield a brilliant flame. It is well not to put more spirit in 
the lamp than is required for immediate use ; and the wick 
must be cut perfectly level. 
Mr. Lobb then called attention to the small brilliant white 
flame afforded by this lamp, and pointed out the means by 
which a current of air was carried in the centre of the flame 
through the circular wick. To illustrate the portability of 
this lamp, he observed — “ The chimney can be put in one 
pocket, the reservoir, which unscrews and receives a cap at 
the top to keep the spirit from oozing, can be placed in the 
waistcoat pocket, and the remaining portion of the lamp will 
go into the coat pocket. The lamp, being patented, can only 
be obtained of Mr. Young, in Queen Street. 
I have also to bring to your notice another lamp, the in- 
genious contrivance of one of our own Fellows, Mr. Piper, 
the inventor of the portable horizontal slide cabinet. This 
lamp is contained in a small box with a sliding lid. When 
required for use, the stem of the lamp is screwed into the 
box-lid, and the lamp is affixed to the stem by a clip, which 
enables it to be adjusted to any height. The dimensions of 
the various parts, and the neat way in which they all pack 
into a small compass, make this an excellent travelling lamp, 
and it has the additional merit of very moderate price, ten 
shillings and sixpence. 
