Feb., I923.] U.S. BUREAU OF STANDARD.q NOTES. ~57 electrical sensitivity in the extreme ultra-violet, but that the reaction gradually decreases with decrease in wave-length. Several spectral response curves are given of Case's barium and strontium photoelectric cells, which have maxima at o.4z~ and
The preparation of ironcarbonmanganese alloys and the effects of carbon and manganese on the mechanical properties of iron
✍ Scribed by R.P. NevilIe; J.R. Cain
- Publisher
- Elsevier Science
- Year
- 1922
- Tongue
- English
- Weight
- 147 KB
- Volume
- 194
- Category
- Article
- ISSN
- 0016-0032
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📜 SIMILAR VOLUMES
Feb., t923.] U.S. BUREAU OF STaXDaRDS NOTI.ZS. ## 253 and to formulate a statement of the conditions under which the spherical aberrations of two thin lenses will compensate one another. This last is confined to the simplest case, in which the lenses are close together. The treatment is in part a
\(\mathrm{Fe}_{2} \mathrm{O}_{3}, \mathrm{Mn}_{2} \mathrm{O}_{3}\), and their mixtures are reduced by carbon in nitrogen. The product depends on manganese loading. A cohenite li \(\mathrm{c}_{3} \mathrm{C}\) type phase is stabilized by substituting manganese into the lattice. A single phase cohenite
## Birmingham Seotion. A SIMPLE EORJI Oh' GAS GENERA'I'OR. 1tY ,FIL\NK XIIEDDEN, U.SC., E1.C. 'We author cleacribcd n hrgc.si+ccl \Volrlcr iiplnratirs, for w e UH a pu gcncrntor for gcnenil laboratory purpoxes. It consists of n oylindricnl jiir 46-50 om. high anel 18 em. dinmeter, fitted wit11 R s