Learn the benefits and risks of options and how to start trading options Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Samantha (Sam) Silberstein, CFP®, CSLP®, ...

“…in 1948 Hilger amalgamated with the well-known metrology instrument manufacturer E R Watts and the company became known as Hilger & Watts…In 1993 the company ...

After the 16th century, transits and theodolites, a precision instrument, were used for accurate measurement of horizontal and vertical angles. Theodolites (invented by Leonard Digges, an English ...