When an engine is ignited, it produces thrust and boosts the rocket into the sky. After the propellant is used up, delay is activated, producing tracking smoke and allowing the rocket a brief coast.
infirmary (plural infirmaries) 1  A place where sick or injured people are cared for, especially a small hospital; sickhouse. 2  A clinic or dispensary within another institution.
Elizabeth Blackwell and her sister. The New York Infirmary for Women and Children was opened in 1853 by the first woman to earn a medical degree in the United States. The European and Latin American tradition of charity hospitals. . Another innovation was the first hospital conducted only by women.