No summary available.
No summary available.
Thanks GS for a number of his papers on railway bridge fractures, gravitation, and the spectrum.
Replies to several queries about papers of JH. JH describes the accidental production of some interesting copper salt crystals.
No summary available.
Thanks GS for 'canary' glass. Pleased with GS's 'photological' research, extending the spectrum.
Thanks GS for his paper on fluorescent spectra; JH is interested in having these rays used on quartz, hoping to find his 'thermic' rays acting.
No summary available.
Writes to acknowledge receipt of a testimonial on behalf of [George] Wilson.
Comments on color as a sensation, and on GS's thoughts on 'lavender rays.'
Advises GS against spending £800 to verify the available drawings of Saturn; instead JH suggests alternative methods.
No summary available.
Declines to serve on experimental committee for R.S.L.
Agrees to help in other ways than as committee member [see JH's 1855-2-25].
Asks GS about ordering instruments from [George] Wilson.
Inquiring about the cost of instruments being shipped.
No summary available.
No summary available.
No summary available.
No summary available.
No summary available.