268 THE MICROSCOPICAL NEWS. 
merit, and suggests that the money hitherto devoted to subscrip- 
tion with us, might, with even better results, be invested in them. 
The first is ‘The Journal of the Postal Microscopical Society,” 
which may be purchased from Mr. W. P. Collins for six shillings 
per annum; while the second is “Cole’s Studies in Microscopica 
Science.” ; 
Mr. Cole, through want of support, was about to suspend the 
issue of these “Studies,” when Messrs. J. G. Hammond & Co., of 
Edmund Street, Birmingham, came to the rescue, and intend to 
issue the letterpress, for one year at least, at their own risk. In 
their circular they say, “Although we shall in future produce and 
issue the work, it will, as heretofore, be edited by Arthur C. Cole, 
Esq., F.R.M.S., of Oxford Gardens, Notting Hill, London, and the 
high class preparations, solely of his production, together with the 
beautifully coloured Chromo-lithographs, both of which have called 
forth the highest encomiums from subscribers and press, will be 
continued exactly the same as in the preceding two volumes.” 
The preparations to accompany the letterpress will, as heretofore, be 
prepared by Mr. A. C. Cole, and by Mr. Martin J. Cole, the 
Instructor in Practical Microscopy at the Birkbeck Institution. 
We feel assured that no one meaning work, will be dissatisfied 
with either of these publications. We have extracted several 
articles for this month’s number from the latter. 
ON INJECTING. 
By ARTHUR J. DOHERTY. 
HE term injecting, in its micrological application, signifies the 
filling of the arteries, veins, and other vessels of animals with 
coloured substances for the purpose of showing their arrangement 
in, and their course through, the tissues. 
Proficiency in the art of making anatomical injections can be 
acquired only by continued practice, and by the exercise of 
patience and perseverance; the same remark applies even more 
strongly to the injecting of diseased tissues which have been 
excised out of the living body, as in this case there are so many 
vessels, which have been severed, requiring to be ligatured to pre- 
vent the escape of the injection. The beginner is recommended 
to note carefully the causes of each failure, and to take precautions 
to avoid these in his subsequent practice. If this is done, the art 
of injecting will be learned sooner, and more easily than it otherwise 
could be. 
