( 328 ) 
t Monthly Microscopical 
Journal, Dec. 1, 1869. 
NOTES AND MEMOEANDA. 
Hew Cheap and Good Foreign Objectives. — It is alleged by Dr. 
Benecke that a young optician named Gundlach, of Berlin, has suc- 
ceeded in making object-glasses, wbicb are cheaper and more powerful 
than those of Hartnack and other opticians. His No. 7 is better than 
Hartnack's No. 9 or No. 10, at less than half the price of the No. 9. 
It has higher magnifying power, more light, and greater focal distance. 
Max Schultze says that Gundlach's No. 8 is better than Hartnack's 
No. 14, and is only a third of the price. 
Mr. Moginie's Hew Strainer for Collecting-bottles. — In the 
notice of a New Strainer for Collecting-bottles, at page 286 in our 
last number, for Mr. Maginie, 37, Queen Square, read Mr. Moginie, 
35, Queen Square, W.C. [The erratum occurred in the Eeport of the 
Old Change Microscopical Society.] 
A Simple Form of Cell. — Mr. W. Beavan Lewis gives in ' Science 
Gossip' the following as an easy and effective method of making 
cells : — Purchase a box of endless elastic bands, and the addition of a 
jar of Brunswick black will now supply all the requisite material for 
the formation of a large stock of good and neat cells. Slip one of these 
bands on to the blades of a pair of scissors, slightly opening the latter 
to keep the band near the points, and prevent it from slipping off; 
now paint it over with a thin layer of Brunswick black, allow the 
band to fall flat on the centre of a glass slide, fix your object, and 
gently place your thin cover over it, which will firmly adhere to the 
band : this is cell No. 1. For cell No. 2 another band is slid on to 
the scissors after the first band has been painted ; the pressure of a 
forceps will cause them to adhere, and now you have your cell double 
the depth of the first. The bands which I use are half an inch in 
diameter, and with these the deepest cell advisable to be made is that 
of three bands ; should a deeper cell be required, bands of a larger 
diameter are necessary. I have a large number of objects mounted in 
this way, the majority being dry preparations, but I find this cell is 
equally serviceable for mounting in glycerine or Goadby's solution. 
Br. Lionel Beale on Protoplasm. — We understand that a second 
edition of this work is just about to be issued. 
The Origin of Life. — Those who wish to see an able detailed and 
dispassionate review of the facts and arguments for and against 
Heterogeny, should consult a series of papers under the above title in 
the recent numbers of the ' British Medical Journal.' They are, we 
believe, from the pen of a distinguished Fellow of the Eoyal Micro- 
scopical Society. 
Mr. Stephenson's New Safety Stage. — The following is a de- 
scription of this ingenious contrivance, exhibited at the last meet- 
ing of the Eoyal Microscopical Society. The " Safety Stage " 
consists of a thin frame of brass, with thicker pieces screwed on at 
