Rina Scott. 
i 24 
how delighted would a university teacher he if his elementary 
students came up to him with the sort of knowledge and the sort of 
desire for fresh knowledge which such a training would have 
produced in an ordinary intelligent hoy or girl of eighteen or so. 
The student entering a college or university need not know the 
name of a single natural order, he need not have even looked 
through a compound microscope, nor have heard of such a word as 
“ obdiplostemony,” but if he has a good first-hand acquaintance 
with actual plants and some idea of the way they live, the 
foundations of his botanical training have been well and truly laid. 
The ideal elementary university course, a most important and 
difficult subject, and the aims and methods of advanced university 
teaching, will be dealt with in our next number. 
(to be continued). 
HOW TO KEEP A SALT-WATER AQUARIUM FOR 
ALGOLOGICAL EXPERIMENTS. 
A SALT-WATER Aquarium is often very valuable to the student 
J\ of algology, as more minute and continuous observations can 
be made on seaweeds in this way than is possible by only examining 
them direct from the sea. I propose to give a short description of 
the best way of managing such an aquarium, based on the personal 
experience of many years. 
A glazed earthenware pan two feet across, or if preferred, a 
large bell-glass aquarium should be provided. Then sufficient pebbles 
from the sea-shore should be taken to cover the bottom of the pan 
or glass. If they are taken direct from the sea-shore they can be 
used at once; if other stones are used, it is as well to boil them 
before putting them in the aquarium. Fill the aquarium with sea¬ 
water ; this can most easily be brought home in clean quart 
wine bottles firmly corked. 
Now the first essential is to get the water into a healthy 
condition. This requires a little patience and may at first seem 
tedious, but when once done one is well repaid for the trouble. 
It is best to put nothing into the water but a small quantity of 
healthy green seaweed —Ulva or Cladophora answer very well— 
and two or three periwinkles. 
