Freckenham
8 April 1828
Dear Sir,
Chalk from Berks
Constituent Parts
Lime = 54 10/16
Car: Acid = 42 8/16
Alumina = 1 11/16
Black Oxide of Iron = 0 9/16
Water = 0 10/16
= 100 Grs
Chalk from Essex
Lime = 53 13/16
Car: Acid = 41 14/16
Alumina = 2 13/16
Black Oxide of Iron = 0 14/16
Water = 0 10/16
= 200 Grs
Above, you have the Analyses of the Specimens which you sent me some time since. You will perceive that the Berks: Specimen yields more Lime than the Essex D o. contaminated with a Less Q y of Iron & Alumina, on this fact it is better adapted for the Purpose of Agriculture than the Lime of its associate. But the Essex Lime being Less in Q y united with more Iron & Alumina is better fitted for making Mortar. No Mag n is present in either Specimens and the Silica is less than any assignable Quantity.
Yours truly | J. Holme
Please cite as “HENSLOW-68,” in Ɛpsilon: The Correspondence of John Stevens Henslow accessed on 28 March 2024, https://epsilon.ac.uk/view/henslow/letters/letters_68