The Royal Aeronautical Society's Data Sheets

Abstract

The origin of the Society's Stressed Skin Data Sheets was certainly my own paper, R and M No. 1553; it embarrasses me not at all to put it so. In 1930 the Structures Sub-committee of the ARC asked for a summary of the present state of knowledge regarding sheet metal construction, and the chairman, (Sir) William Farren, directed me as secretary to prepare a draft. I did so—the draft was discussed by the Sub-committee, revised and amended and finally in 1933 published over my name. To me the paper was a chore, albeit a welcome one, and all I myself really got out of it in the end was the realisation that I could do with a little more Anglo-Saxon: “What we know about …” would now be my title.

Preparation and Properties of Ca2 V 2 O 7 Single Crystals

“…The transmission decreased rapidly for wavelengths shorter than 4700A with an apparent absorption edge at ~-,4000A, corresponding to an energy gap of 3.1 eV. This compares with an energy gap of 3.51 eV for C.asV~Os, which also has a higher melting point (1422~ and lower refractive index (n --1.89) (7). This is consistent with its higher CaO content.…”