Here is the unusually detailed hierarchical table of contents and a sample of the text. There is a 14 page index too.
Please note that in this post there are minor differences in font and layout from those in the book.
CONTENTS
Table of contents
Table of Figures
Introduction
Acknowledgements
Chapter 1
Principles
Chapter 2
Anatomical overview
Chapter 3
Dissection
Tools, materials and workplace
Removing the sub-assemblies
Brandis and their successors
SNO-T and Freiberger sextants
Chapter 4
The Frame
Materials
Form
Performance
Scales
Bearings
Tapered shaft and socket
Parallel shaft and bearing
Ball bearing
Chapter 5
The Micrometer
History
The rack
The Micrometer mechanism
Micrometer screw bearings
Swing arm bearings
Release catches
C Plath, Tamaya, USN
Mark III and clones
Brandis and USN Mark II
Hughes and Son
Heath and Co
Micrometer drums and verniers
SNO-T and Freiberger Präzisionsmechanik
micrometer dis-assembly
re-assembly
Chapter 6
Vernier scale
Principle
Reading
Tangent screw assemblies
Usual pattern
Variations
Chapter 7
Mirrors and mirror mountings
General
Index mirror and mounting
Tilting foot
Tilting mirror
Tilting mirror, Brandis variant
Spring-opposed screws
Sealed mirror
Horizon mirror and mounting
Early sextants
Common twentieth century
mounting
Survey sextants
Circular cast cells
Hughes Admiralty pattern sextants
Kelvin Hughes Survey sextants
Full view mirror
Adjusting screws
Chapter 8
Shades and shade mountings
Materials
Form
Assembly
Tapered pin assembly
Shouldered screw assembly
Parallel pin assembly
Eye piece shades
Uncommon shades
Polariser
Wollaston prism
Astigmatiser
Intra-telescopic shades
Chapter 9
Telescopes
Optics
Galilean or star telescope
Keplerian or inverting telescope
Ramsden eyepiece
Huygenian eyepiece
Prismatic monocular
Choices
Telescope structure
Galilean or star telescopes
Objective lens
Blooming of lenses
Eye lens
Keplerian or inverting telescopes
Objective lens
Eye lens
Prismatic monocular
Sighting tube
Chapter 10
Telescope mountings
Fixed pillar and ring
Vee and flat without collimation
Vee and flat with collimation
Rising pieces with fine adjustment
Chapter 11
Legs and handles
Legs
Plain handles
Battery handles
Chapter 12
Scale magnifiers and illuminators
Magnifiers
Illuminators
Shaded lamp
Light guide
Photoluminescent magnifier
Chapter 13
The Case
Box structure
Box furniture
Securing contained parts
Chapter 14
Cleaning, restoration and repair
Frame
Cleaning
Inspection for damage
Paintwork
Scales
Bearing bush
Bent legs
Index arm
Micrometer and rack
Micrometer worm
Rack
Swing arm assembly
Tangent screw assembly
Mirrors
Replacement
Resilvering
Mirror mountings
Frames
Clip-securing screws
Adjusting screws
Shades and their mountings
Telescopes
Telescope mounts
Handles
Lighting systems
Chapter 15
Adjustments
Perpendicularity error
Side error
Index error
Collimation of telescope
Chapter 16
Calibration of sextants
Multiple collimators
Rotary table and autocollimator
Two autocollimaotrs and surface table
Micrometer calibration
Chapter 17
Some sextant makers
English
German
U.S.A.
Japanese
Chinese
French
Dutch
Appendices
1 Effects of mis-collimation on
sextant error
2 Analysis of centring errors
3 Recipe for resilvering mirrors
Bibliography
Short glossary
Index
Have a browse through a few pages to get the “flavour” of the book. Don’t forget you can click on the image to enlarge it, though the quality of the photograph won’t be as good as the original in the book.
The Nautical Sextant 
I like your detailed annotations and clear photos!
Fantastic in many ways: skilled in restoring a precision instrument and selflessness in sharing your work (for free). Genius.