Research Division

Reprinted from "INSULATORS - Crown Jewels of the Wire", December 1974, page 29

Dear Dora,

Below is a drawing of a large glass knob I bought today. It is of dark green aqua glass, with no markings. It is quite heavy (1 lb. 4-1/2 oz.) and has a threadless pin hole which tapers to the top. These were found on old internal wiring in a nearby industrial plant. Would appreciate any information you or your readers might have. Sincerely yours, 
Jim Woods

- - - - - - - - -

Well, Jim, there's not much I can tell you about your glass insulating or break knob, except that it seems every old catalogue I've seen on insulators seems to carry them in all shapes and sizes. Some have tapered threadless holes, while others have straight up and down threadless holes. The majority of break knobs seem to be made by either Brookfield or Hemingray, some embossed, some not. We don't seem to find very many out here on the West Coast as in other parts of the country.

Dear Dora;

I have an aqua glass Hemingray No. 4 C.D.# 124 that can find nothing at all about. The exact embossing is:

Any available information would be appreciated. 
Thank you, 
Jim Trabert

- - - - - - - - - - 

I found your Hemi No. 4 listed in Milholland's 3rd Revision on page 83. It is listed in his 1974 Suggested Insulator Price List from $5.00 in poor condition to $20.00 in mint condition. Francis Terrill's book, Hemingray Insulators Priced, lists this insulator on page 16 and prices it at $15.00. Both books call it a "National Pony". There are many variations of embossings.

Dora

Dear Dora:

Enclosed find picture of a mint CD 266. This is a fantastic insulator that enhances Larry's collection. Hope you like seeing it. It is embossed: PAT JUNE 17, 1890. 
Mary Beth Veneziano 
West Chicago, Illinois

- - - - - - - - - - -

Editor's Note:

Well, it looks like at least two of the elusive CD 266's have shown up. One in Illinois, and one on the West Coast. There's a full scale photo of it on page 257 of Milholland's new 3rd Revision Most About Glass Insulators.

Dear Dora,

We have a Brookfield miniature in light aqua with the following embossing:

It is 1" wide and 1-1/4" tall.

I think I remember reading something about the miniature a couple of years back, about its history, etc., but cannot find it. Could you give me some info on it? The one in Milholland's 3rd Revision is described as "clear" and is embossed only "BROOKFIELD". Would appreciate any help that you could give.
Sincerely, 
Elton & Lynda Gish

- - - - - - - - - 

Dear Readers,

I need help with this one! Is anyone familiar with this miniature? 

Your Editor

Glass Block Insulator	Glass Block (End View)
Glass Block with Dominion 42	With Surge Fence Insulator
With Lightning Rod Insulator

Here are some pictures of a type of glass block insulator I acquired from a bottle collector recently. It is smaller than any of the other blocks I've seen, measuring 2-1/2 inches long by 1-1/4 inches wide. Also, the wire groove is straight in stead of notched. The block is flanged at each end and is light aqua in color. Any information will be appreciated.

Above is a picture of a fire alarm telegraph machine from the Atlanta Fire Department. It is made of brass, with the clockwork mechanisms encased in glass. Three telegraph sounders are in the glass box in the middle. Base is slate and wood. The namesplates (2) read:

"The Gamewell Co." Patents;

and

"The Gamewell F. A, Tel. Co.
New York"

I would like to hear from anyone knowing something about the glass block. Thanks. 
Ben Kelley 
College Park, Georgia