French companies restricted from using high-end encryption

Sparking or steel: Facts which Everybody

Sparking or steel: Facts which Everybody Using Steel Should Know and Use. By E. Pitois, Graduate of Ecole Polytechnique, Chief Inspector of the Construction Section of the Governmental Air Service, with a preface by General Hirschauer, Former Chief of Military Aviation, Former Commander of the Second Army, Chairman of the Aviation Committee of the Senate. Translated from the French and enlarged by John I). Gat, Research Metallurgist, American Sheet and Tin Plate Company. ix–89 pages, illustrations, 8vo, cloth. Easton, The Chemical Publishing Co., 1929. Price, $2.00

✍ Lucien E. Picolet 📂 Article 📅 1929 🏛 Elsevier Science 🌐 English ⚖ 170 KB

In this rtsumi: and handbook on color matching, the author explains the modern conception of the nature of color phenomena, the relation of color to white light, and curves of color-intensity against wave-length. How these curves are obtained from the photo-cell calorimeter and how values of the in-