Description
Astronomical telescope with Ramsden eyepiece and cross-hairs
Used to set a tuning fork ringing without bruising its tines
Printed across a 7-inch sturdy paper disc
catching condensate in distillation and steam-handling setups
adjustable via motor voltage to mimic temperature and float weight to mimic pressure
Two Parallel Necks Multiple Adapter, 24/29 Socket and 24/29 Cone, Borosilicate 3.3 Glass US-Unavailable Astronomical telescope with Ramsden eyepieceMultiple adapter in borosilicate glass features two parallel necks with 24 29 sockets for connecting multiple components in chemistry apparatus.
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