Healthy Vibrations

A correspondent sent me this 1912 ad for the White Cross Electric Vibrator, which will restore your youth and clarify your skin, and do all manner of other things. Away, boredom!

The scan was high enough in resolution (and the printing adequate), so here is the actual image of the box --



a complete set with every fitting you would need.

Apparatus for X-Ray Experiments

From the 1902 F. Gross experimenters' equipment catalog:



You are getting warmer, warmer....

An Early Radio Transmitter

From Alfred N. Goldsmith, "Radio Telephony" (Wireless Press, 1918). The Alexanderson Alternator was an alternative to the spark gap for transmitters. It had a rotating disk with many individual windings such that the edge of the disk could cut magnetic flux lines at a relatively high rate ... perhaps even 100 KHz! These were popular for a while, but eventually transmitting tubes replaced them for continuous signal generation at high power.

Early Bloggers Arranging for Publication

Another eBay item, this time from eBay seller blancetnoir in category Art > Prints > Antique (Pre-1900) > Other.

A Circular Russian Ironclad (fl. 1876)

From a German periodical of the 1870's, and found in the current listings of eBay seller marderll. You'll note the similarity to the Monitor, and unique Russian touches. The Cheesebox on a Raft is now a Cheesebox on a pie-plate.