I'd like to ask the list if anyone has an Army M2 or even civilian B&L 8x56 that they would be willing to donate or sell to the museum. These were used on the W.W.II Army anti-aircraft fire control directors of which the museum has one which has been restored, but is lacking the binocular. I can provide a receipt and non-profit tax deduction information for anyone willing to donate this binocular.
Take it easy, Earl
The M1 was an 8 x 56, with oculars set at about 80 degrees to the body, made by Keuffel & Esser for use with Height Finder T9E1, which was cancelled and 'no more than a pilot Binocular M1 was ever made'.
The M2 was an 8 x 56 by B & L, for searchlight control, issued to the Engineer Corps, and 2,476 were procured at $70.
(Source: Frankford Arsenal. Encyclopedia of Army Ordnance Binoculars. Philadelphia, no date, after 1944.)
Subject: Thiomersol (fungus preventive)
Thiomersol is readily available-my hospital pharmacy stocks it-the pharm tech indicates the common name is merthiolate. Both merthiolate and mercurochrome were very common mercury/alcohol based topical antiseptics used to sterilize instruments by soaking and as a skin antiseptic. I believe mercurchrome had the characteristic red orange color; an advantage when using, as it showed clearly the areas treated. Mercury concerns has decreased their use in recent years but they have the advantage of not causing antibiotic resistance as the use of topical antibiotic ointments may. They can be irritating. Methymethacrylate is used as tissue glue by surgeons. I believe commonly available super glues are chemically closely related. Arnie
Subject: fungus treatment
From: guus kasteel <guus.kasteel@___>
Probably enough has been said at the list or in the fungus.txt on the mode of action of thimerosal. The thing I would like to add is that thimerosal (the nonproprietary name) is available from most chemical suppliers in small quantities such as Sigma-Aldrich and should be easily obtained via a local chemist. They probably will not sell to individuals. Though it is still widely used in injection, ophthalmic or topical solutions, please note that the concentration in medical use is much lower as stated in the fungus.txt paper; 0.2% versus 0.01 to 0.001%. Handling the pure component requires certain safety measures to avoid absorption via inhalation (dust) or via the skin (!).
Very similar to the fungus problem in optical instrument, electronic equipment may be damaged by fungi. Many of you will be familiar with the typical color and smell of the interior of WWII (and later) military electronic equipment. This is caused by coating used for moisture and fungus proofing, developed by the Signal Corps Ground Signal Agency. The spray paint was fortified with salicylanilide, phenyl-mercury-salicylate (a similar compound as thimerosal) and pentachloorfenol. I have no idea on the concentrations.
Subject: Re: stripping and coating of small lens lots
From: rab <rab5@___ring.com>