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strong light, gave the following appearances:—In one and a 
half hours an opaque spot showed itself in each, which rapidly 
spread and death ensued, caused possibly by light, by a raised 
temperature, or deficiency of respiration. On December 23rd 
placed three eggs in a hatching tray, on a white earthenware 
palette, putting one into each partition, one and a half inches 
of water flowing over them. The cover of the tray was left 
off, and the coach-house door put open, so as to give a good 
amount of light to the ova. Three more eggs were put into 
the dark part of the tray for comparison, and which hatched in 
due time. On February 23rd, observing that most of the eggs 
in the trays had hatched, but that the three on the palette were 
still in the ova state, I tried, as an experiment, a plan I had 
been informed of at Howietoun of transferring eggs near the 
hatching period from glass or metal substances to wood, which 
usually expedites hatching. I placed them in the tray at 10a.m., 
and in about two hours one had assumed the peculiar colour 
showing that it would soon hatch, and by one o’clock it came out; 
a second hatched at five p.m., and a third during the night. I 
have reasons however for believing that light is injurious to 
the eggs of the Salmonide during the incubating stage. 
January 8th, 9.30 a.m., two trout eggs were put into a 
tumbler of salt water, of the specific gravity of 1019°. This 
water had been received from Weston-super-Mare, through the 
kind offices of Mr WerseErep, but, owing to the journey, was 
rather turbid. The water in the tumblers was three inches above 
the eggs, and changed every morning. 9th, 2 p.m., eggs look 
as if dead, but took them over to Mr Weruerep’s, to put 
under the microscope, as my glass case had been broken. One 
was found to be dead, (the eyes being prominent and the mouth 
open) the other to be alive. As the condition of the water 
may have acted deleteriously, determined to try this experiment 
over again. 
January 9th, 2 p.m., placed two more trout eggs into a 
tumbler of salt water, which was now clear, the tumbler in this 
and the other experiments being placed in a hatching tray, so 
