What did Goldstein discover?

Answer Eugen Goldstein discovered canal rays in 1885. The Encyclopedia Britannica describes canal rays as positively charged ions quickly moved through a "perforated cathode in an evacuated tube." The di... Read More »

Top Q&A For: What did Goldstein discover

What is the origin of the name Goldstein?

Goldstein is a Jewish last name. Its direct translation is gold stone, according to "Anatomy of a Surname" by Suzanne McVetty. According to McVetty, Eastern European Jews formed last names from the... Read More »

How many rose petals does it take to make 16 ounces of rose oil?

It takes 2,000 lbs of rose petals to make 16 oz. of rose oil.Source:Herbs 'n Oils: Rose Oil

I have black spots on all the leaves on my rose bush - should I cut the rose down or how do I get rid of them?

Blackspot is a fungus that causes black spots about 1/16 to 1/2 inches indiameter to form on the leaves and sometimes stems. The infected leaveslater turn yellow around the spots and eventually fal... Read More »

Do rose plants seed themselves by dropping rose hip pods?

Roses are self-propagating plants that produce seeds in a bulbous pod known as a rose hip. Rose hips can be collected and replanted or allowed to fall to the earth, where some of them will take hol... Read More »