Astronomical SeriesUniversity of Pennsylvania, 1964 - Astronomy Vol.1 published 1916 [i. e. 1899-1916]. |
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absolute humidity altitude appears areas astronomical darkness average Bateson BB MJ BB BIRCH MOUNT JOHN Black Birch BLACK BIRCH MOUNT calm Central Otago Christchurch cirrus cloud cover Coronet Peak district dust effect estimates feet figures fire fogs ground cover haze image motion image quality inches jet stream JULY JUNE knots Lake Tekapo latitudes LILYBANK Mackenzie Basin Manorburn Marlborough maximum mean MJ BB MJ months Mount John Mount Malita N.Z. Meteorological Service Nelson City normal observations observatory overcast partly cloudy percentages period photometric possible precipitation rain raindays rainfall records relative humidity road RODING RIVER seasons Section skies smoke snow South Canterbury South Island spells stars station summit support facilities survey TABLE temperature testing throughout the night Timaru usuable nights visual Wellington whilst WINTER SPRING Zealand zero cloud ZERO USUABLE USELESS