Hahn Printing (13 results)

Condition: Acceptable. N/A (illustrator). Item in acceptable condition! Textbooks may not include supplemental items i.e. CDs, access codes etc.

Paperback. Condition: Good. N/A (illustrator). First Edition. It's a preowned item in good condition and includes all the pages. It may have some general signs of wear and tear, such as markings, highlighting, slight damage to the cover, minimal wear to the binding, etc., but they will not affect the overall reading experience.

paperback. Condition: Fair. N/A (illustrator).

Condition: Acceptable. N/A (illustrator). The item is fairly worn but still readable. The book may have some cosmetic wear (i.e. creased spine/cover, scratches, curled corners, folded pages, sunburn, stains, water damage, bent, torn, damaged binding, dent). - The dust jacket if present, may be marked, and have considerable heavy wear. - The book might be ex-library copy, and may have the markings and stickers associated from the library - The book may have considerable highlights/notes/underlined pages but the text is legible - Accessories such as CD, codes, toys, may not be included - Safe and Secure Mailer - No Hassle Return.

Paperback. Condition: Fair. No Jacket. N/A (illustrator). Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less 1.21.

Paperback. Condition: As New. No Jacket. N/A (illustrator). Pages are clean and are not marred by notes or folds of any kind. ~ ThriftBooks: Read More, Spend Less 1.21.

Paperback. Condition: Very Good. No Jacket. N/A (illustrator). May have limited writing in cover pages. Pages are unmarked. ~ ThriftBooks: Read More, Spend Less 1.21.

paperback. Condition: Very Good. N/A (illustrator). Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority!

Paperback. Condition: Good. N/A (illustrator). Connecting readers with great books since 1972! Used textbooks may not include companion materials such as access codes, etc. May have some wear or writing/highlighting. We ship orders daily and Customer Service is our top priority!

Condition: Good. N/A (illustrator). Used book that is in clean, average condition without any missing pages.

Trade Paperback. Condition: Very Good. N/A (illustrator). 1st Edition. 1st printing. text clean and unmarked. binding tight. covers have light wear. edges of pages have light wear.

paperback. Condition: New. N/A (illustrator). In shrink wrap. Looks like an interesting title!

Soft cover. Condition: Fine. Beschreibung einer Rechnungs-Maschine, wodurch man ohne Muhe, durch blose Herumfuhrung eines Triebels, die vier gewohnlichen Rechnungs-Arten verrichten kann. (Description of a calculating machine, whereby one can perform the four usual types of calculation without effort, simply by moving a pinion around.) In: Der Teutsche Merkur, Weimar, 1779, edited by C. M. Wieland. Section 5, pp 97-192. 178x117mm. Original wrappers. This single issue of the Teuscher Merkur has been beautifully restored and intricately rebacked just a lovely job. The issue itself is FINE, with only occasional foxing. The text and wrappers are crisp; this is just a joyful copy. The issue is housed in a newly-made, custom clamshell box of calf-backed boards with a paper label. The box is new and of high quality. Superb copy. [++] Philipp Matthäus Hahn (1739-1790), known as the "Priestermechaniker (priest mechanic)") was a German pastor, astronomer, clockmaker, and inventor of tremendous quality. He is also famous for his four-function fully-working stepped-roller calculating machine, of which the good Parson and his mechanics made five or six. [++] First printing of the announcement and description of the first fully functioning four-function (addition, subtraction, division, multiplication) calculator. "The First Functional Calculator"--edtechmagazine only (Hahn). (The first successful commercially produced mechanical calculator would come about 40 years later with the introduction of the Arithmometer.) [++] This instrument was developed from about 1773/4, with Hahn finally publishing a description of the cylindrical brass, iron, and enamel machine and how it functioned in the Tesucher Merkur [the issue offered here] in 1779. [++] The famous calculator created by Leibniz in the 1670's using the stepped roller--later employed by Hahn--though the original Leibniz machines didn't really function properly. The four-function Hahn calculator was also preceded by the work of Anton Brown and Jacob Leupold (though Hahn may not have known of their work), and their work remained very largely unknown and obscure, unlike the success and visibility achieved by Hahn. [++] "Special consideration deserves the Parson Phillip Mathieus Hahn who developed in 1773 the first functional calculator based on Leibniz's Stepped Drum. Hahn's calculator had a set of 12 drums in a circular arrangement actuated by a crank located in the axis of the arrangement. Hahn made these machines until his death in 1790, however, his two sons and his brother-in-law, Johann Christopher Schuster, continued with the manufacture probably as late as 1820."--Redin, A Brief History of Mechanical Calculators (online). [++] "In an article in the magazine Teutschen Merkur from 1779, Hahn mentioned his inspiration: When my time was occupied with making astronomical clocks, I had to deal with calculations of long fractions, multiplication, and division of large numbers, and I was so overwhelmed, that my primary work was close to being stopped. Then I recalled that some time ago I read a book for Leibniz, which mentioned his calculating machine, for which he spent a lot of money, without satisfactory results. I decided to spare some time in this direction. Certainly, I also wasted much time and money experimenting and troubleshooting the construction of my device. Finally, I managed to construct a rather advanced and reliable machine. Most difficulties I met during the construction of the tens carrying mechanism." Also: "During the rotation of the mechanisms of the machine by means of the handle in the middle of the lid, a stepped drum will be engaged with the wheel of the main counter, which is also attached to vertical axes, and according to the vertical position of the appropriate stepped drum, the wheel will be rotated to 0, 1, , 9 teeth.The dials are graduated with two scales."--My Time Machines (online) (Write for more detail).