20 THE NORTHERN MICROSCOPIST. 
November r7th, 1880. 
Dear SIR, 
If circumstances permitted I should be very pleased to assist 
you in the manner suggested in your letter of the 6th inst. Un- 
fortunately, however, I find it almost impossible to discharge my 
existing literary liabilities, and in illustration of that fact need only 
to direct your attention to the late appearance of Part 11. of my 
“Manual of Infusoria” announced for November 1st. A few days’ 
illness delayed its final revision, and has thrown me so much in 
arrears that I shall have hard work to make it up again. 
At the same time, I wish every success to “The Northern 
Microscopist,” and feel sure it will supply a great existing need. 
So soon as I am at liberty you may depend upon my support in the 
way of occasional contributions. 
Many of the forms of Infusoria figured in the first number of my 
book were discovered by me when a resident in the Northern Dis- 
trict some few years since. Notably: M/onosiga gracilis, Codosiga 
cymosa, Salpingeca ampulla, and SS. cornuta, all marine types 
obtained from the tanks of the Manchester Aquarium, then under 
my charge. 
The accompanying pen and ink sketch I made from a piece of 
weed supplied by Mr. Thomas Bolton ; and serves well to illustrate 
the great variety and abundant development of the Flagellate 
members of the Infusorial series, hitherto but little studied on 
account of their exceedingly minute size. You are welcome to 
make what use you like of it. 
_ Regretting my inability to assist you further just at present, 
I am, yours very faithfully, 
W. SAVILLE KENT. 
NOTES AND QUERIES. 
CLOUDED SLIDES.—Can any of your readers tell me why some 
of my specimens mounted in Balsam have become cloudy and 
unfit for examination? |S. A..G. 
WHITE VARNISH.—How is the white varnish made which is now 
so commonly used for ringing slides, and how are the coloured 
rings produced? Geo. Haines. 
Livinc OrRGANISMS.—It may be unknown to many of our readers 
that Infusoria, Entomostraca, and other living organisms, may be 
obtained at a very reasonable charge from Mr. Thomas Bolton, 
57, Newhall Street, Birmingham. He has removed from 17, Ann 
Street, where he established a naturalist’s studio some years ago. 
