Miscellaneous Intelligence. 145 
mont assuredly make much more work than it takes away from those 
ow the occupation of a microscopic artis 
be 2 the object to be delineated is flat and moderately thin, as com- 
pared with the necessary power in use,a very excellent picture may be 
produced without any aid from the imner; but where the object is not 
so formed—although when under microscopic examination the mind 
can Pinel acquire a correct knowledge of the form by focusing up 
and —it is evident that from the very main of a good ob- 
puea a gt he can only be obtained in one plane at a time, and it will 
then be necessary to take several pictures in different planes, and call 
in the artist’s aid to unite the productions. The immense amount of 
time and labor that can be thus saved in delineating subjects i on 
elaborate character can only be appreciated by those who hav 
tempted the production of objects of this class. 
It is scarcely necessary to enter into a preliminary explanation on the 
photographic phenemona, as it is of -very little use for an entire novice 
shall, therefore, presume that 1am addressing those who understand 
the general principles of photography, and shall therefore commence 
The Arrangement of the Apparatus.—Place the microscope with the 
body ina horizontal position, and screw on the objective to be used, and 
pressing down the sliding spring-piece. ‘Turn the mirror aside or re- 
move it altogether, and having taken out the eye-piece, insert into the 
body a tube of brown paper Jined with black velvet, in order to prevent 
the slightest reflection from the sides, which would infallibly spoil ayery 
picture if allowed to operate. ‘The Jens should then be removed 
the focus of the lens used to concentrate the light, for which purpose an 
ordinary convex lens of 24 to 5 diameter, with its hx t side to- 
ug 
the mel way with the coarse and fine adjustment, 
done too accurately ; in fact, for delicate objects, a means of magnifying 
the image is absolutely requisite, and for this purpose a ee eye- 
Pe cps in contact with ground Pl is perha 
Econp Senses, Vol, XVI, No. 46—July, } 
