Letter from [John Allen] Harker, Meteorological Office Observatories, The Observatory, Eskadalemuir, Dumfries-Shire, to Mr [Robert] Harrison Enclosing a paper by Ernest Howard Griffiths and Ezer Griffiths on the specific heat of metals, along with his report [enclosure not present]. Apologises for the delay in sending them, explaining that it was due to an explosion at Nobels Factory at Arden where he has been trying to help in elucidating the cause and advising precautionary measures for the future. Mentions a list of apparatus belonging to the GG Committee now at Burlington House and asks if he may borrow a few items as the physical apparatus in the Meteorological Office Observatories is in short supply. 24 April 1913