Please give a short sketch of General Mackenzie, lately appointed Brigadier General in the regular army.

M. J. Foreman.

Answer.—Ranal S. Mackenzie was born in New York in August, 1840. Graduating from West Point in 1862, he was made Second Lieutenant of Engineers. He immediately entered active service in the Ninth Corps, and was wounded at the second battle of Bull Run. When Lee, in 1863, advanced into Maryland, Mackenzie was very busily employed in constructing bridges for the Union forces which followed in the rear of the rebel army. He took part in the various battles of the Army of the Potomac in Maryland and in West Virginia, and in May, 1864, had charge of a company before Richmond. He passed through the battle of the Wilderness, and in June was wounded before Petersburg. For his gallantry he was appointed Brigadier General of Volunteers. Resuming the command of his company, he continued his efforts against Petersburg. At the battle of Five Forks he commanded a division of cavalry with so much skill that he was brevetted Major General. After the close of the war he retained the command of a company in his old corps. In March, 1867, he was promoted to the Colonelcy, and in 1870 he was transferred to the cavalry and sent to the Mexican frontier. In quelling the depredations on the Texas border and in putting down the Indian insurrections in New Mexico and Arizona he has since displayed considerable military ability. Previous to his present promotion he had charge of the army in New Mexico, Santa Fe being his headquarters.


SOUND AND SENSE.

Wyoming, Ill.

Can sound be produced with no ear to hear?

William E. White.

Answer.—The word sound is used in different senses. In the sense defined in the first definition given by Webster and Worcester, the answer to your question is “no;” but in the sense of his second definition, it is “yes.” This second definition, as given in the last edition of his Unabridged Dictionary, is as follows: “Sound—The occasion of sound: the impulse or vibration which would occasion sound to a percipient if present with unimpaired organs.” This use of the word is strikingly illustrated in the expression “inaudible sounds,” i.e., such as can only be heard by the help of instruments.