Reading RPLS is free for the whole profession. Members post, reply, and get the members-only rooms.
Notifications
Clear all
Topic starter
Translate
▼
English
Spanish
French
German
Italian
Portuguese
Russian
Chinese
Japanese
Korean
Arabic
Hindi
Dutch
Polish
Turkish
Vietnamese
Thai
Swedish
Danish
Finnish
Norwegian
Czech
Hungarian
Romanian
Greek
Hebrew
Indonesian
Malay
Ukrainian
Bulgarian
Croatian
Slovak
Slovenian
Serbian
Lithuanian
Latvian
Estonian
I recently acquired this instrument and it appears to be a protractor to be used in conjunction with a plane table. I have a preliminary date of the first quarter of the 19th C. and it is most likely of British make. The instrument is bronze and had an 8" scale on the bar with two sets of divisions for 1/50th and 1/100th of an inch. The protractor is marked in Minutes with the vernier scale giving Seconds. There is no signature on this piece. I found a similar one by John Pool in the Smithsonian. Any additional information on this would be appreciated. Thank you.
?ÿ
Robert
?ÿ
Posted : November 28, 2022 5:55 am