Description | 'Dear Sir, Mr [Norman Joseph] Lockyer says that the electric lamp will be quite useless without a "carrier" for the slides. Please get Watsons, or whoever are the proper people to supply me by tomorrow. It should be long enough to carry two plates, 8 ins [inches] broad and 5/8 in [inches] thick. Yours truly, H Rix Asst Sec RS [Assistant Secretary Royal Society]'. |