About the barometric formula for the measurement of heights.
About the barometric formula for the measurement of heights.
Of course JH is right; regrets he gave him so much trouble. Hopes his own construction of P. S. Laplace's atmosphere is correct. Hopes JH's daughter had a prosperous journey.
Outlines advantages of erecting great reflector in Melbourne [WW's colony] for observation of southern nebulae.
Encourages GA to develop some experiments to study the electrical phenomenon [see GA's 1861-9-23] more carefully.
Asks JH to contribute to The Educational Times.
Encloses printed copies of letters received from Johann Lamont regarding apparatus for examining Galvanic currents in the earth; would like his comments on them. Gave lecture in Manchester on the eclipse.
Thanks for his information. Has been trying to obtain a copy of JH's Outlines Astr. Further queries regarding trade-winds.
Compares JH's 'stereoscopic phenakistiscope' (in 'Instantaneous Photography,' 1860) with AW's invention called 'Thaumatrope.' Suggests how to make moving pictures. 'Government Certificated [School] Masters' in England, Ireland, and Scotland should be enlisted to make meteorology observations.
AW's 'Thaumatrope' is ingenious, but applies only to periodic movement. JH aims to reproduce non-periodic motion. Commends AW's suggestion to employ government schoolmasters as meteorology observers.
JH's reply was first AW heard that 'Stereoscopic Thaumatrope' had already been made. Lists two requirements for workable system of enlisting government schoolmasters for meteorological observations. AW and fellow students are ready to assist.
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