It was invented by Samuel Siegfried Karl Ritter von Basch in 1881.
a sphygomanometer is actually a tool used for measuring blood pressure in your arteries. the "instrument" refers to a tool, but i do see where you got that.
jv
I used calibration standards available from the manufacturer, which in my case was Brookfield. The maker of your viscometer should offer them. If not, search the internet using "viscometer calibration standard solutions" as your search term.
invented in 500BC before electricity was invented
The CD was invented in 2001 Thomas clamps invented it.
Gloria Mejia invented it and she invented it in 1998
When and where were snickerdoodles invented Why were snickerdoodles invented
who invented the washboard?
Yes, the computer is invented.
Invented is the past participle of the verb invent. verb /past /past participle = invent /invented /invented
The Chinese invented the Rudder.it was invented by the Chinese
when was sprite invented ! == == when was sprite invented ! == ==