# Treatise on Mathematical Instruments: Their Construction, Adjustment, Testing and Use Concisely Explained

Virtue Bros. & Company, 1866 - 185 pages

### Contents

 PART 1 Drawing 7 Protracting Scales 14 Gunters Lines 25 The Plain Scale 33 Marquoiss Scales 42 Beam Compasses 48 Coggeshalls Sliding Rule 55
 Land Chain 92 Levelling Staff 104 Water Level 112 Artificial Horizon 121 Circular Protractor 129 Computation of the Area of a Plot 135 Troughtons Reflecting Circle 141 Method of Observing with the Transit 151

 Management of Drawing Paper c 64 Lenses 70 Microscopes 76 Solar Microscope 88
 The Reading Microscope 160 APPENDIX 168 INDEX 183

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