No.

£. s. d. Codeword

The Prices of the Revolving Nosepieces are:

131. Nosepiece for two objectives...............................0.15.

132. Nosepiece for three objectives..............................1.0.

133. Nosepiece for four objectives.............................1. 5.

The subsequent adaptation of a Revolving Nosepiece to a Stand is not subject to an extra charge.

It should be noted that a nosepiece has a depth of 18 mm. and that its attachment to the microscope adds therefore 18 mm. to the length of the tube. Henee, to maintain the prescribed tube-length of 170 mm. the draw-tube should be set at 152 mm.

Clutch Objective Changer No. 134.

134. The Clutch Objective Changer will be found particularly useful in those cases where investigations requiring frequent changes of several objectives have to be carried out on a single microscope.

The Clutch Changer consists of a collar which screws into the microscope tube, and a clutch. The upper part of the latter is attached to the screw collar, whilst the lower one is hinged to it after the manner of a bulldog paper clip. At its lower end the screw collar has a conical shoulder which accurately fits a conical recess in a series of loose collars provided with a screw thread to take the screw of the objective. The claw of the lower hinged fitting takes the form of a semi-circular fork with two upturned prongs and, when released, presses the loose collar with its conical seating firmly into the recess in the fixed collar.

Obviously, as many loose collars will be needed as there are objectives in the equipment of the microscope. Clutch Objective Changer with three Loose Collars 0.15,

135. Loose Collars, each.......................................0. 1,

The Clutch Objective Changer has likewise a depth of 18 mm. To maintain the standard tube-length of 170 mm. the draw-tube should accordingly be set at 152 mm.

0 Duplo 0 Triplo 0 Quadruplo

0 Clutch 0 Adapter

23

---

Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,50 %.

La langue de reconnaissance de l'OCR est l'Anglais.

---