DATA FIRMAMENT
— Key —
For more detailed explanations of the Firmament’s architecture and elements, please visit the site’s About page.
Birds —
OCCURRENCE
1864, Connecticut River Valley

SIZE

MIGRATION STATUS
1864, Connecticut River Valley
Birds flicker ON and OFF to indicate their seasonal arrivals and departures.
Migratory birds = outside of the arc
Resident birds = bounded within the arc

† See Site Sources & Library for details about bird data and its sources.
Poems —
Indicated by + marks, all “bird” manuscripts from 1853-1886 are placed throughout the Firmament as follows:
CIRCULATION STATUS
Non-circulated poems = bounded within the arc
Circulated poems = outside of the arc

Poems datable to seasons and years = in light, above the horizon line
Poems not datable to seasons and years = in darkness, below the horizon line
DATE

† See Site Sources & Library for details about poem data and its sources.
Weather —
TEMPERATURE
The background color of the Firmament field shifts between warm and cool gradients to reflect the average temperature of each month of 1864 as recorded in the Snell Meteorological Journal.

PRECIPITATION
The daily measurements of rain and snow fall as recorded in the 1864 Snell Meteorological Journal are conveyed in blue (rain) and pink (snow) circle time-line graphs along the horizon.
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CLOUDS
The appearance of clouds reflects the prevailing type and quantity observed during each month of 1864 as noted in the Snell Meteorological Journal.
SKY PHENOMENA
Three additional sky events noted in the Snell Meteorological Journal for 1864 are registered in the Firmament:
In the dark hemisphere, the Aurora Borealis streams across the skies in February and April; an Auroral Arch appears in September, and Lightning flashes in February, April, May, and November.
† See About and Site Sources & Library for details about weather data and its sources.