Show mite of radium a mass of material A tube ot of radium generally gene rolly made usi of by physic physicians inns is about n shade under an inch in length anil and about an eighth in diameter it contains milligrams of radium bromide this minute quantity Is the product of twelve tons of ore three tons of hydrochloric add acid five alv e tons of carbonate of soda one ton of sulphuric acid ten tons of coal burned in the opera tion of reduction more thau than a mont li ot or woric and five hundred successive |