John H. W. Pettit letters to his family in England, illustrated with sketches by the writer, 1852-1868 - Page 186

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Traversing microscope attached to Horizontal limb for the purpose of reading Vernier - A spare needle of the most approved kind
- a very steady stand -
Clamping and slow motions screws [word crossed out]
[line crossed out]
The box strong and well fitted up -

It is of course unnecessary to mention that the needle is never used when it can possibly be avoided, but in a new uncleared country like this there are times when [words crossed out] one's obliged to have recourse to it - for instance though a heavily and densely limited forest where it is altogether impossible to work clear of or remove the obstacles to the sight  - In such cases where quantity as well as quality is an object it must occasionally be employed and you

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