95 



revolutions of the drum are counted by an index. The screw measures up 

 to 10 mm. 



No. 126: Stage screw Micrometer, in case, Price: Marks 120. . Code-word: Pecable. 



The instrument is adapted for all our large and medium stands with the 

 exception of that for brain sections. In subsequent orders the factory number of 

 the stand should be quoted. 



For measuring- the angles of microscopic objects we construct the Gonio- 

 meter Eye-pieces, Nos. 127 and 128, the former number with HUYGENIAN eye- 

 pieces 2 or 3, the latter with compensating eye-piece 4. The eye-lens is 

 adjustable as with the micrometer eye-pieces. A glass disk with a series of pa- 

 rallel lines ruled upon it rests upon the diaphragm. An indicator, attached to the 

 upper part of the eye-piece, moves within a divided circle fixed on the draw-tube. 



Price : Code-words : 

 No. 127: Goniometer Eye-piece ivilh HUYGENIAN eye-pieces 



2 or 3 with divided circle, in case Marks 35. . Pecaute. 



,, 128: Goniometer Eye-piece with compensating eve-piece 4 



with divided circle, in case 48. . Pecemento. 



Appliances for measuring thicknesses. 



Dial Cover-glass Gauge, No. 129, for the exact measurement of the thick- 

 ness of cover-glasses, thin plates, &c. - The measurement is effected by means 

 of a clip projecting from a box-shaped round casing (see Fig. 54). The reading 

 is given by an indicator moving over a divided circle on the lid of the box. 

 The divisions show hundredths of a millimetre. The gauge measures thicknesses 

 up to 5 mm. 



Price: Marks jo. . Code- word: Pecora. 



Fig. 54. Cover-glass Gauge, No. 129. 



( 2 / s Full Size.) 



Cover-glass Gauge of simpler construction, No. 130. This instrument 

 consists mainly of a screw with divided drum and, like the preceding, records 

 readings of 0.01 mm. 



Price: Marks 75. . Code-word: Pectoral. 



, 3ena. 



