The microscope made easy: or, I. The nature, uses and magnifying powers of the best kinds of microscopes ... II. An account of what surprizing discoveries have been already made by the microscope / By Henry Baker.

  • Henry Baker
Date:
1744
Catalogue details

Licence: Public Domain Mark

Credit: The microscope made easy: or, I. The nature, uses and magnifying powers of the best kinds of microscopes ... II. An account of what surprizing discoveries have been already made by the microscope / By Henry Baker. Source: Wellcome Collection.

    69/392 (page 37)
    To be placed after Page 36. A TABLE of the MAGNIFYING POWERS of CONVEX GLASSES, >mployed in SinciE Microscopes, according to the Diftance of their Focus Calculated by the Scale of an Inch divided into an Hundted Parts : ewing how many times the Diameter, the Superficies, and the Cube of an Objeét is magnified, when viewed through fuch Glafes, to an Eye whofe natural Sight is at Hight Inches, or Eight Hundred of the Hundredth Parts of an Inch. Magnifies| Magnifies| Magnifies the the Dia-| the Su- | Cube of an meter, | perficies, Objekt, 1, or 50} 16 2.56 4,096 } | ws, OF 49 Od oO 8,000 | es or 30 26 676 17,570 #, Or 20 40} 1,600 64,000 Wed | AS) 53] 2,809; 148,877 2 41° * 57] 3,249] 18193 | | SE MN 1 Me er ek 226,98 1 | | ; 12/5 66, 4,356, 287,496 | Bo. Uae ts. G, bOd 373,248 dee of] 3, or 10$@ 80] 6,400] 51,009 \ Times. 9| 88) 7,744) 681,472 | | 8 ie 100] 10,000} 1,000,000 | 7\5% 414] 12,996] 1,481,544 | 6 | S. 133] 37,080] ' 2,3 G34 ao, ‘for s |= 160] 25,600 ee | 4. 200| 40,000] 8,000,¢00 3 | 266| 70,756] 18,821,096 | | 2 | 400}160,0co0}] 64,000,000 Fes 800}640,000] 512,000,000 } t The greateft Magnifier in Mr. LEEwENHOEK’s Cabinet of Microfcopes, prefented to the- yal Society, has its Focus, as nearly as can well be meafured, at one Twentieth of an Inch Diftance m its Center, and confequently magnifies the Diameter of an Object 160 times, and the Superficies »600. But the greateft Magnifier in Mr. WiLson’s Single Microfcopes, as they are now made, s ufually its Focus at no farther Diftance than about the Fiftieth Part of an Inch ; whereby it has a wer of enlarging the Diameter of an Obje& 400, and its Superficies 160,000 times.