Nature and Art, June 1, 1807.] 
THE MICROSCOPE. 
181 
microscope, traveller’s microscope, pocket micro- the traveller’s microscope, is a handsome instrument 
scope, &c., and which has advantages of its own. in form somewhat like Messrs. Baker’s. The three 
Fig. 3. 
Fig. 2. 
It frequently happens that the naturalist or the 
physician requires to examine some objects under 
circumstances when it is impossible to have access 
to an ordinary microscope. To provide against such 
emergencies the instrument referred to has been 
prepared. There are four separate forms of it. The 
first we shall describe is that made by Messrs. Baker, 
of Ilolborn (fig. 3). When packed in its case, it 
takes the shape of an average-sized tourist’s tele- 
scope, and is suspended by a sling which passes 
over the shoulders. When taken out, 
three legs unfold from a central pivot 
on which the tube swings, and form 
a tripod stand, the larger leg bearing 
the stage and mirror. It is focussed 
roughly by sliding the tube as in a 
telescope ; but the finer adjustment 
is provided for by a screw and spring 
attached to the central leg. When 
required to be placed vertically, these 
smaller legs screw into the instru- 
ment and constitute a tolerably firm 
foot. A second form of this class of 
instrument is made by Messrs. 
Murray & Heath, of J ermyn Street, 
and is shown in fig. 4, where A and 
C show the instrument in the ver- 
tical and inclined position. Mi’. 
Highley, of Green Street, Leicester 
Square, supplies two distinct varieties of the portable 
microscope. The first, which we believe he styles 
legs upon which it rests, however, have this advantage 
over Mr. Baker’s, that they are fastened into a semi- 
circular collar, in which the body of the microscope 
swings, instead of into the central leg. The object 
of this is to enable the worker to employ the micro- 
scope either in the inclined or vertical position 
without the trouble of altering the foot. The 
accessory apparatus supplied with this microscope 
is of the usual description. To this class also 
belongs a Liliputian microscope, which Mr. Highley 
has appropriately named the waistcoat piocket 
microscope (fig. 5). It is not an instrument which 
we should recommend for the purpose of research ; 
but it is certainly a wonderful miniature. When 
packed in its German silver case, it measures about 
three or four inches in length, and is not more than 
Fig. 4. 
three-quarters of an inch in diameter. It is pro- 
vided with an object-glass which divides into inch 
