Rage

Shockingly, however, spending most of your time in close proximity to 500 pounds of liquid mercury is Not Great For One’s Health and tons of lighthouse keepers started to go crazy from the whole. Mercury poisoning thing. Hence why there are a lot of “haunted” lighthouses or wickies that lose it and maybe do a bit of manslaughter.

In a letter written on April 19, 1825, Augustin Fresnel proposed the use of mercury to reduce the friction in revolving lenses. His statement follows: “I propose to float our rotating devices, of the first order, in a bath of mercury, instead of placing them on rollers. This project won't present many difficulties; nevertheless, as I have not put it into execution, I won't require you to adopt it for your first lighthouse.”

Fresnel’s plan for mercury flotation was not put into practice until 1890 when Monsieur Leon Bourdelles, Chief Engineer of the French Lighthouse Service, designed and built a workable mercury flotation system. The mercury bath allowed the lens to operate in an almost frictionless environment and, additionally, allowed the speed of rotation to be dramatically increased.

It mattered for optics reasons.

Under less-than-ideal conditions, you can only see the beam when it’s pointed more or less directly at you. In-between beams you would not be able to see anything. One solution to this was to create multiple beams, and the lenses Mr Fresnel designed usually created 8 beams. But, even still, duration between flashes could be as long as one minute in the old mechanical roller systems.

The nearly frictionless operation of the Mercury suspension system allowed the lenses (large pieces of precisely ground glass weighing several hundred pounds in some cases) to rotate fast enough that they could be redesigned to create fewer (usually 3) beams. Fewer beams from a similar light source will be proportionally brighter, and the gains in speed were sufficient that duration between flashes could still be reduced to as little as 10 seconds.

This was a big upgrade. It didn’t just make the lighthouse signal faster, it allowed them to completely overhaul the lens and derive more visibility from a light source.

2) Many vapes contain diacetyl, which, when inhaled causes popcorn lung, or scarring of the lung

3) Ultrafine particles, when being inhaled, can be lodged in the trachea (not good!)

4) Ultrafine particles can also constrict the arteries in the lungs potentially causing A HEART ATTACK

"It must have serious value!"

a health policy paper has been published saying the name is officially updated to polyendocrine metabolic ovarian syndrome (PMOS)

polyendocrine= multiple endocrine factors

metabolic = affecting/affected by metabolism

ovarian = from the ovaries

essentially, instead of using the symptomatic term (many people with PMOS do not develop cysts) the new term widens the diagnostic area and makes it easier to diagnose, treat, and do research on people with PMOS (even atypical types, such as no cysts).

it may seem like a waste of time to change a name instead of focusing on research, but for a lot of medical professionals a name can be associated with a hard set collection of symptoms, so the name needs to change to acknowledge that the disorder is not well understood and has a broader, subtler, and often missed set of symptoms. for example ADD is considered an antiquated/unused term, and now comes under the ADHD umbrella. in healthcare names and terminology changes all the time, and this is a positive change. your local healthcare professional may not know about this unless theyre really up on the news though!

in case you want to read about the name change process that was published in the Lancet (one of the most impactful and well respected medical journals):