Show SCIENCE NOTES it takes microbes mic robes to form n procession an inch long kiel estimates the surface of the lungs at square or ten times that of the external body what is said to be the first fossil insect ever found in the southern coal field of pennsylvania was recently sent to the institution at washington by mr W V achman living at A sound vibration is the to and fro motions of the air molecules if the sound le in air the motions being in the line of the movement of the air wave that is longitudinal vibrations the air particles act upon the tympanic membrane and cause it to move to and fro at the same anto |