Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Material_Muslin Used to supply rechargeable DC

Used to supply rechargeable DC power for circuit experiments

this 2mm-plug lead pairs a banana plug at one end with a crocodile clip at the other for fine-pitch experimental work

this 22 SWG bare copper wire on a 250g reel runs about 225 feet — the workhorse fine gauge of the line

Adjustable locking hook positions items 110 mm from the support rod on this suspension clamp

measuring atmospheric pressure via a fluid column mounted on a single-piece frame

Mason's Hygrometer with Wet and Dry Bulb, Wall-Mounted Material_Muslin Used to supply rechargeable DCWall mounted Mason's hygrometer with two identical dual scale thermometers one dry and one kept wet via a water reservoir calculating relative humidity from their paired reading difference.