. Bollettino - Stati Uniti Museo Nazionale. La scienza. Figura 32.-vista ingrandita di inizio stampa di coniatura che mostra il tempo relativamente breve "quick-filettati" (cioè di derivazioni lunghe vite). Foto per gentile concessione di U.S. Servizio di menta, la sig.ra Rae V. biestere. fuori gli intrusi, guardando gli uomini swing le leve del fly premere; esso deve essere stato intorno a mezzogiorno, per il sig. Eckfeldt entrò nella stanza, guardare in mano e ha dato un segnale agli uomini che hanno smesso di lavorare. Vedendo me di sbirciare da dietro il bar, egli mi ha portato dai bracci e mi ha sollevato al di sopra di essa. Impostazione me down mediante coniatura premere mi ha chiesto se non ho voluto fare un

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. Bulletin - United States National Museum. Science. Figure 32.—Enlarged view of early coining press showing the relatively short "quick-threaded" (that is, of long lead) screw. Photo courtesy of the U.S. Mint Service, Mrs. Rae V. Biester. out intruders, watching the men swing the levers of the fly press; it must have been about noon, for Mr. Eckfeldt came into the room, watch in hand, and gave a signal to the men who stopped work. Seeing me peering over the bar, he took me by the arms and lifted me over it. Setting me down by the coining press he asked me if I did not want to make a cent, at the same time stopping the men who had put on their jackets to leave the room. He put a blank planchet into my hand, showed me how to drop it in, and where to place my hand to catch it as it came out; the lever and weights were swung, and I caught the penny as we boys called cents, but I at once dropped it. Mr. Eckfeldt laughed and asked me why I dropped it? Because it was hot and I feared it would burn me. He picked it up and handed it to me, then certainly not hot enough to burn; he asked if it was not cold when he gave it to me to drop into the press; he told me to look and see there was no fire, and feel the press that it was cold; he then told me I must keep the cent until I learned what made it hot; then I might, if I liked, spend it for candy- When I showed the bright new cent to my father, whom I found in his workshop, and asked him to tell me what made it hot, he said he would show me; he 64. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.

Parole chiave associate all'immagine

• bookauthorun
• bookcentury1800
• bookdecade1870
• booksubjectscience