<table class="toccolours mw-content-ltr layouttemplate commons-file-information-table" style="width: 100%;" dir="ltr" lang="en"><tbody><tr><th class="type fileinfo-paramfield">Camera location</th><td style="border:none;"><span class="plainlinks"><span class="plainlinksneverexpand"><a class="external text" href="https://geohack.toolforge.org/geohack.php?pagename=File:Gunter%27s_quadrant_with_declinatory_for_51%C2%B030%27_in_Putnam_Gallery,_2009-11-24.jpg&amp;params=042.376507_N_-071.116074_E_globe:Earth_type:camera__&amp;language=en">42° 22′ 35.43″ N, 71° 06′ 57.87″ W</a></span></span> <a class="mw-kartographer-maplink no-icon" data-mw-kartographer="" data-style="osm-intl" href="//commons.wikimedia.org/wiki/Special:Map/13/42.376507/-71.116074/en" data-zoom="13" data-lat="42.376507" data-lon="-71.116074" data-overlays='["_9607e58001e112cca9acdea5664a6d3a269e2c5e"]'><img alt="Kartographer map based on OpenStreetMap." src="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/20px-Openstreetmap_logo.svg.png" decoding="async" title="Kartographer map based on OpenStreetMap." width="20" height="20" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/30px-Openstreetmap_logo.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Openstreetmap_logo.svg/40px-Openstreetmap_logo.svg.png 2x" data-file-width="256" data-file-height="256"></a></td><td style="border:none;">View this and other nearby images on: <a class="external text" href="https://wikimap.toolforge.org/?wp=false&amp;cluster=false&amp;zoom=16&amp;lat=042.376507&amp;lon=-071.116074">OpenStreetMap</a></td><td style="border:none;"><a href="//commons.wikimedia.org/wiki/Commons:Geocoding" title="Commons:Geocoding"><img alt="info" src="https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/18px-OOjs_UI_icon_help.svg.png" decoding="async" width="18" height="18" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/27px-OOjs_UI_icon_help.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/OOjs_UI_icon_help.svg/36px-OOjs_UI_icon_help.svg.png 2x" data-file-width="24" data-file-height="24"></a><span class="geo" style="display:none"> 42.376507;  -71.116074</span></td></tr></tbody></table>
A <a href="https://en.wikipedia.org/wiki/Gunter%27s_quadrant" class="extiw" title="w:Gunter's quadrant">Gunter's quadrant</a> (a type of <a href="https://en.wikipedia.org/wiki/astrolabe" class="extiw" title="w:astrolabe">astrolabe</a>) with a declinatory for 51°30', on display at the Putnam Gallery in the Harvard Science Center
<a rel="nofollow" class="external text" href="http://ragesoss.com/">Sage Ross</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>