id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
44206	Robinson, John	Old-Time Nautical Instruments			.txt	text/plain	4432	202	66	Using the sextent or Hadley quadrant the observer stands facing the sun, but old Hadley quadrants were made with a back sight so that they could be used like the Davis quadrant, thus making two independent observations the average of which would ensure greater accuracy. Mr. George Francis Dow has searched the early probate records of Essex County coast towns between 1634 and 1680, a period of nearly fifty years, and finds but thirteen references to nautical instruments in inventories and wills.	cache/44206.txt	txt/44206.txt
