| Description | Includes:
Correspondence from JM Ade-Hall on specimens, June and September 1968.
Worksheets, graphs and calculations all in Blackett's hand, some dated June 1968.
The 'Single lava' is not identified, but may be the Canary Island specimen referred to by Ade-Hall in his letter of August 1967 in C.170.
See also C.185, note. |