I don't think it is a cumulative recorder, it has no needle or writing instrument to record data like that. It seems much more simple than a...
It is possible, I am going to check in at the University's library see if I can find any catalogs of old psychological instruments of any type. I...
Yes there is only those words that are taped to the aluminum drum, and thank you so much for the help, this is very insightful. I may have...
This is very helpful thank you so much! Do you have any ideas what the wood cylinder could be used for below the aluminum drum?
I just found something else about this particular instrument, at the back of it, there is a small slit in the alminum back plate that allows you...
Hello, I am currently working on identifying and displaying antique psychology instruments for the psychology department at my university, I have...
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