Devices and structures

It's a steering anode.

Anodes protect all metal parts below the waterline (hull) from corrosion. This is a piece of more electrochemically "active" metal that needs to be attached to the protected part.

For boats, which mostly walk on fresh water, usually use aluminum anodes. zinc anodes - for salty.

The old method of collecting wood resin for making turpentine

A laser sensor from a traffic camera designed to calculate the volume of traffic. The data obtained is used to determine the amount of the budget for road maintenance.

Question: "What is this bubbling out of the ground in my yard? Purple-metallic color, sticky inside. It keeps coming out, even if I clean it up with a shovel"

As a result, the author of the photo himself figured out this magical problem:

"I was sent to the fire station, from where a team was sent to me to check. They dug up the ground, and it turned out that it was mounting foam from a can left by the builders in the yard. Water got on the can, it rusted and began to let in, after which the foam reached the surface"

George du Maurier's cartoon about the "electric pinhole camera" of 1879 (interestingly, on March 7, 1876, Alexander Bell received a patent for the invention of the telephone) it is often called an early prediction of television and the appearance of videophones, as well as widescreen and flat screens. (The screen in the picture is about 2 meters wide and the aspect ratio is 2.7: 1, the same as that of the Ultra Panavision).

Text in the picture:

EDISON TELEPHONOSCOPE (TRANSMITS LIGHT AND SOUND).

Every evening before going to bed, the father and mother install an electric pinhole camera over the mantelpiece in their bedroom, delight their eyes by watching their children on the Antipodes (Antipodes, here, probably, means a point on the earth's surface, diametrically opposite to the initial one) and cheerfully talk to them over the network.

The head of the patriarchal family (in Wilton Place):

"Beatrice, come closer. I want to whisper." 

 Beatrice (from Ceylon):

- "Yes, dear Dad"

"Who is this charming young lady playing on Charlie's side?"

Beatrice:

"She's just arrived from England, Dad. I'll introduce you to her as soon as the game is over!"

The lines on the landscape of North Wales from the Google Maps satellite image are the thinning of the so-called heath to improve the habitat of grouse.

Heather is mowed by a tractor to create a diverse habitat and different stages of heather growth.

Bonfires are lit in French vineyards to protect them from frost.

Wrapping small trees in a film for protection for the winter period

Rotating lasers are replacing the usual scarecrows that protect fields from birds.

The first electric hearing aid, called Akufon, was created by Miller Reese Hutchison in 1898.

In the photo, Siemens presented the first electronic devices for the deaf, which replaced the classic horns of ancient times.

Machines with lifts for repairing power lines. From afar, they can be mistaken for giant spiders, UFOs, etc.

The remains of a scientific study of mollusks

Strange capsules with a height of about 1.8 m. Seen at a ski resort in the Alps, near the chairlift.

These are O'bellx devices for controlled avalanche descent. They use gas and loud sound to knock loose snow off the mountain to prevent it from accumulating and avalanches.

Sliding static cone collecting flight data during tests (on a long cable)

Sliding static cone collecting flight data during tests (on a short cable)