Proposes an adjustment in the proportions of the ingredients in the next glass-making experiment.
Proposes an adjustment in the proportions of the ingredients in the next glass-making experiment.
Discusses origin and reactions of enclosed borate of lead. Postscripts on parallel strata in glass.
Thanks for the copy of his paper and errata. Received a packet of specimens of glass, which he presumes came from MF. Regarding the specific gravity of some of the specimens. Comments on further experiments to be made.
Has read his paper on vaporization with much interest and can see no objections to its arguments. Comments on some of the details.
[More detailed version of JH's 1826-5-26]. Has mentioned it to Humphry Davy.
Hears that the Board of Longitude is to be dissolved; it will therefore be necessary to seek a new source of income for the continuance of the Optical Glass experiments. Will be guided by MF's wish whether to continue the experiments. Charles Anderson has showed him curious experiments with the fusion of Fluor with clay.
Apologizes for sending a letter of introduction for someone recommended to JH, without first getting to know the third party.
Asks for copies of some of MF's writings to complete JH's set.
Comments on MF's experimental results when an electromagnetic field affects polarized light.
Has just seen mention of MF's latest experiments showing the connection of light and magnetism. Comments on these. Proves some of his own theories to be correct.
Sends details of an experiment he would like MF to carry out. Cannot do it himself as he has no suitable glass.
Has opened the sealed paper MF sent, and JH is now returning it.
Thanks MF for sending a 'healing liquid.'
On the periodicity of sun spots.
More on lacunae in JH's set of MF's writings [see JH's 1838-10-3].