318 JOURNAL OF SCIENCE. 
sary to take those precautions which will tend to reduce it toa 
minimum. 
As every examiner knows, there are two limits to be equally 
avoided in the setting of papers. One is, not to set them too 
low, as then the subject is taken up solely as a “pass” one, and 
the standard is unworthily lowered. The other is of course not 
to set them too high, as in that case candidates are apt to avoid 
the subject altogether as one which “does not pay.” In my own 
humble opinion the former tendency has been shown in our 
University examinations in the papers set on physical sciences. 
This may be remedied to some extent by amalgamating heat 
and electricity as one subject, as sound and light are treated. 
Elementary biology also should give place to botany and zoology. 
I hope the day is not far distant when every candidate for 
University Honours will require to pass in one branch each of 
physical and natural science. To attain this desirable consum- 
mation, all occupied in teaching these subjects must work ear- 
nestly, but judiciously, not obtruding their dogmas offensively, 
nor blazoning them abroad as the universal panacea which is to 
revolutionise the existing state of things. On the contrary, they 
must possess their souls in patience, must build up in the minds 
of the rising generation a strong conviction that the scientific 
method is the right one, and must show to the intellectual world 
at large that the subjects which they teach possess a high - 
educational value, and one which will be of lasting and practical 
utility to its possessors. 
CORRESPONDENCE. 
a 
MARINE CADDIS-WORMS. 
S1rR,—It may interest your entomological readers to learn, 
with reference to the marine caddis-worm found last year by 
Professor Hutton in Lyttelton harbour, and recently described 
by Mr. R. M‘Lauchlin in the Proceedings of the Linnean Society, 
that some months ago I found a specimen of a very similar tri- 
chopterous larva among seaweeds between tide marks in Port 
Jackson. The case was composed of minute fragments of alge, 
and the form of the head and of the abdominal appendages re- 
sembled closely that of the corresponding parts of the New 
Zealand species, as figured by Mr. M‘Lauchlin.—I am, &c., 
WILLIAM A. HASWELL. 
Sydney, Oct. 4th, 1882. 
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