

BAIRD ^XmOCK (LONDON) LTD. 



1113 r Ocular Micrometer, in case .. ..050 



1114' Ocular Cross-line Micrometer, in case .. ..050 



1115' Stage Micrometer, i millimetre in 100 parts, in case .. 10 



1116 T Stage Micrometer, i centimetre in millimetres, last millimetre in .1 millimetre, in 



case . . . . ; . . . . . . . . . . . ..060 



Micrometer Oculars for Achromatic Objectives, No. 1108. 

 1117' Huyghenian Ocular 2 or 3, with micrometer .. .. .. .. .. 18 



1118' Huyghenian Ocular 2 or 3, with drum and screw for moving the micrometer laterally, 



called the drum ocular with micrometer, in case . . . . . . . . . . 200 



Micrometer Oculars for Apochromatic Objectives, No. 1107. 

 1119' Compensating Ocular 6, with micrometer .. .. .. .. 1 11 



1120' Compensating Ocular 6, with drum and screw for moving the micrometer laterally, 



drum ocular with micrometer, in case . . . . . . . . . . . . 2130 



1121 T Dial Cover Glass Gauge, measuring thicknesses up to 8 millimetres to T <y of a milli- 

 metre .. .. .. .. .. .. .. .. .. 1100 



1122 



1125 



1122 r Abbe's Apertometer, in case 



1123' Abbe's Apertometer, with slot-guide for the indicators, in case 



1124' Abba's Test Plate, incase 



1125' Abba's Stereoscopic Ocular, in case 



3 10 

 4 10 

 10 

 9 



This apparatus is designed for stereoscopic as well as ordinary binocular observation of microscopical objects 

 with any desired magnification. (See Carl's Repertorium, vol. xvii., 1881, pp. 197-224 ; also Journal of the Royal 

 Microscopical Society (2), vol. i., 1881, pp. 203-211 ; E. Abbe, Ges. Abhdl., vol. i., 1004, pp. 244-272.) 



(Continued on next page.) 



CROSS STREET HATTCTNr GARDEN, E-C 



