41. Who invented the iron press, and when? 42. Who invented the Columbian hand press? 43. What demand soon arose, and how was it met? 44. Who invented the Washington hand press and when? 45. What was the first attempt to use power in press operation? 46. What was the first American attempt to use power in press operation? 47. What sort of power was originally used? 48. Tell about the inventions of Adams, Ruggles, and Gordon. 49. Tell about the invention of Merritt Gally. 50. What were the inventions of Kidder and Harris? 51. What types of high-speed small presses are made? 52. What was the first attempt to build a cylinder press? 53. What was the first American attempt to build a cylinder press? 54. Who invented the first successful cylinder press? 55. Tell the story of Hoe & Co. down to 1845. 56. What important invention did Hoe & Co. bring out in 1845? 57. What were the inventions of Pratt and Bullock? 58. What did Hoe & Co. produce in 1847? 59. What did Henry A. Wise Wood invent? 60. Give a list of the most important American inventions in printing machinery. 61. Why is the list not longer? TYPOGRAPHIC TECHNICAL SERIES FOR APPRENTICES The following list of publications, comprising the TYPOGRAPHIC TECHNICAL SERIES FOR APPRENTICES, has been prepared under the supervision of the Committee on Education of the United Typothetae of America for use in trade classes, in course of printing instruction, and by individuals. Each publication has been compiled by a competent author or group of authors, and carefully edited, the purpose being to provide the printers of the United States—employers, journeymen, and apprentices—with a comprehensive series of handy and inexpensive compendiums of reliable, up-to-date information upon the various branches and specialties of the printing craft, all arranged in orderly fashion for progressive study. The publications of the series are of uniform size, 5 × 8 inches. Their general make-up, in typography, illustrations, etc., has been, as far as practicable, kept in harmony throughout. A brief synopsis of the particular contents and other chief features of each volume will be found under each title in the following list. Each topic is treated in a concise manner, the aim being to embody in each publication as completely as possible all the rudimentary information and essential facts necessary to an understanding of the subject. Care has been taken to make all statements accurate and clear, with the purpose of bringing essential information within the understanding of beginners in the different fields of study. Wherever practicable, simple and well-defined drawings and illustrations have been used to assist in giving additional clearness to the text.