The American Network of

Pressure & Cloud Observers

A directory of member stations, daily logbooks, and inter-station correspondence — twelfth circulated volume — summer of 1908.

We are forty-seven member stations now, and growing by the month. What follows is the working directory of twelve stations whose entries this season have been particularly careful, particularly generous, and particularly worth the postage they cost us. Every reading here was taken by hand, on the hour, by an observer who chose to keep the watch. Pick a town. The keeper there has something to show you.

Member Stations · Continental Map
— surveyed scale, longitudes compressed for legibility —
Click any station marker to open its logbook.

Letters circulate between member stations by ordinary post, sometimes daily, sometimes after a notable sky. Below is a working selection from the summer's mailbag. Click any letter to read it through.

The Network gladly accepts observation notes from non-member readers. If you have watched a sky lately worth recording, leave the entry below. We will read it.

Working Protocols of the Network

Adopted at the spring meeting, Pittsburgh, March 1908. Updated as circumstances warrant.

  1. Three readings daily — sunrise, solar noon (local apparent), and one hour after sunset — at minimum. A fourth, before retiring, is encouraged.
  2. Mercury column to be tapped lightly with the back of the fingernail before each reading. Aneroid units to be compared against a mercury reference at least monthly.
  3. Cloud forms reported by Howard's classification (cirrus, stratus, cumulus, nimbus) with modifying compound terms as needed. Hildebrandsson's 1896 atlas is the authority where Howard is ambiguous.
  4. Wind direction is the direction from which the wind blows. Sixteen-point compass acceptable; thirty-two preferred.
  5. Rain gauges to be sited at least four feet from any vertical surface and at least eight inches above ground. Snow boards level and clear of drift.
  6. Anomalous phenomena to be described in plain narrative prose before any attempt at classification. Describe first, name second.
  7. Postage on inter-station correspondence is borne by the writing party unless a reply is solicited, in which case the soliciting party encloses a stamped return.
  8. No reading is too small. No watcher is in this alone.