From Rev.d J. Holme   8 April 1828

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