Gives particulars of his vision, which WP characterizes as di-chromic. Recounts experiments with red glass sent by JH to WP. Offers to visit if JH wants personal interview.
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Gives particulars of his vision, which WP characterizes as di-chromic. Recounts experiments with red glass sent by JH to WP. Offers to visit if JH wants personal interview.
Thanks JH for note explaining colored glasses and 'positive' colors, saying WP only had a chance to do experiments with 'negative' colors thus far. Accepts JH's invitation to visit.
Sends photograph of drawing of lunar crater Copernicus made with reflector at Rome, to aid B.A.A.S.'s effort in comparing moon's surface with that of earth.
Sends a few explanations of G. B. Amici's third and sixth series microscopes.
Was pleased to receive his letter. Further concerning G. B. Amici's microscopes.
Sent him a few months ago a copy of her book Familiar Astronomy. Wonders if it has miscarried as she has heard nothing.
Hopes his health is improving as his own is. Saw Henry Warburton last week. Gives one of his own theorems. Sends a lecture on the decimal coinage.
Pleased to hear his health is improving, but he should rest in the morning. Thinks it will be a long time before the decimal coinage can be introduced. Comments on cooking in the next century. Has been looking at a 10" bar of aluminum, which [Thomas?] Graham has sent him.
Hears that JH is working on the theories of color blindness and encloses some China silks that may prove useful.
Thought that the book presented by JH had come from Algernon Percy (4th Duke of Northumberland); regrets the error.