Heavy metallurgical balance in a mahogany case with glass sides. The beam is 20.5 inches long. The graduated scale is marked “Paul Bunge Hamburg” and read by telescope. An ivory index at the base of the pillar is marked “No. 9 3897.”
Paul Bunge (1839-1888) began making precision balances in 1866, and soon introduced a balance with an unusually short beam but standard load capacity. Since the mass of the beam was small, so too was the time required for its oscillation.
Ref: German Educational Exhibition of Scientific Instruments (Berlin, 1904), pp. 18-20.
Hans R. Jenemann, The Chemist’s Balance (Frankfurt, 1997), pp. 49-50.
The Cassella Color Company, of New York—distributors of artificial dyes made by the Leopold Cassella Co. in Frankfurt, Germany—sent this sample of Immedial Yellow GG to the Smithsonian in 1914, for display in the U.S. National Museum. Shortly thereafter, German dye factories turned to war production, German imports to the U.S. dwindled, the U.S. government seized many German patents and handed them to American holding companies, and the Cassella Color Company became the Century Colors Corporation.
The Cassella Color Company, of New York—distributors of artificial dyes made by the Leopold Cassella Co. in Frankfurt, Germany—sent this sample of Anth. Chromate Brown EB to the Smithsonian in 1914, for display in the U.S. National Museum. Shortly thereafter, German dye factories turned to war production, German imports to the U.S. dwindled, the U.S. government seized many German patents and handed them to American holding companies, and the Cassella Color Company became the Century Colors Corporation.
The Erlenmeyer flask is a glass boiling flask designed by and named for Emil Erlenmeyer (1825–1909), a German organic chemist. Erlenmeyer first displayed the new flask at a pharmaceutical conference in Heidelberg in 1857 and arranged for its commercial production and sale by local glassware manufacturers.
Ref: Emil Erlenmeyer, "Zur chemischen und pharmazeutischen Technik," Zeitschrift für Chemie und Pharmacie, vol. 3 (January 1860), 21-22.
The Cassella Color Company, of New York—distributors of artificial dyes made by the Leopold Cassella Co. in Frankfurt, Germany—sent this sample of Diamine Fast Yellow A to the Smithsonian in 1914, for display in the U.S. National Museum. Shortly thereafter, German dye factories turned to war production, German imports to the U.S. dwindled, the U.S. government seized many German patents and handed them to American holding companies, and the Cassella Color Company became the Century Colors Corporation.
The Cassella Color Company, of New York—distributors of artificial dyes made by the Leopold Cassella Co. in Frankfurt, Germany—sent this sample of Immedial Olive 3G to the Smithsonian in 1914, for display in the U.S. National Museum. Shortly thereafter, German dye factories turned to war production, German imports to the U.S. dwindled, the U.S. government seized many German patents and handed them to American holding companies, and the Cassella Color Company became the Century Colors Corporation.
