Chemistry and Physics. 263 
Newton which had been read, he wished to mention a circumstance 
ble to account for on any optical or physiological principle with which he 
m 
Was much surprised to see, as I thought, multitudes of large 
mistaken, as she had never seen an evening on which 80 few flies were 
abroad. Soo 
8, the drones quite easily distinguishable from the workers, and all in 
‘apid whirling motion as in the morning. This sce 
Present to me as long as I remai ce, ant neger 
awoke in the night, nor had it entirely faded away by next night, al- 
though much less vivid,’ This was the first instance I had ever heard of 
Notices off fixed impressions, particularly after havin 
now common enough. The Rev. 
liverpool, had given a detailed account of some which had presen 
ears since. I was walking down the streets of Belfas 
daa ¢@ bri i hinine on the new brass-plate 
he bright reflexion of the sun shining ‘ 
under the window of the shop, so that for some seconds Se ae 
‘» and we turned back to see whethér 01 ; 
a tion on the brass-plate, and found that it was. The she son fecal 
Was simple enough. The retina had been partially paraly 
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