We make three patterns of the Electrically Heated Stage. Of these, Type A No. 145 and Type B No. 146 are primarily designed for maintaining a constant high temperature during prolonged periods,

Electrically Heated Stage Electrically Heated Stage

Type A, No. 145. Type B, No. 146.

the latter being arranged for use with high power objectives. Both patterns are mainly intended for the study of mineralogical and petrological sections.

Type C, No. 147, is in a less degree adapted for observation at high temperatures; on the other hand, it admits of the use of

Electrically Heated Stage Objective Shield.

Type C, No. 147.

substage condensers. Type C is adapted for the observation of micro-chemical reactions interference figures in convergent polarised light, and for the study of fluid crystals.

To protect short focus objectives employed in observations at high temperatures from damage due to the action of direct heat rays we supply an Objective Shield with each of our electrical heating stages.

If desired, the Electrically Heated Stages can be fitted with a mercury thermometer registering temperatures up to 2000 C. Where very accurate readings are required it is, however, advisable to employ a thermo-couple.

30

---

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 99,75 %.

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

---