NOTES FROM LONDON. 131 
good form of which is shown in fig. 19. This section-cutter is 
Fig. 19. 
known as Hailes’, and is sold by Messrs. Baker of Holborn. Not 
only are thick sections objectionable on account of their opacity, 
but they also offer great resistance to the total expulsion of air from 
their tubulous mass, 
NOTES FROM LONDON. 
URING a recent visit to the South, we saw several contrivances, 
interesting perhaps to microscopists generally, which it may be 
useful to insert here. 
One of these, suitable for botanical students, has just been issued 
by Mr. Browning, called Houston’s Botanical Microscope, and 
which may be also used for general dissections, not requiring high 
powers. It is shown in fig. 20, and is exceedingly cheap. 
