This Month in History:
1698 Thomas Savery patents the first steam engine
1850 Benjamin Lane patents gas mask with a breathing apparatus
1854 Walter Hunt is awarded the first U.S. patent for a paper shirt collar
1892 1st concrete-paved street built (Bellefountaine, Ohio)
1866 Indelible pencil patented by Edson P. Clark, Northampton, Massachusetts
1869 Margarine is patented by Hippolye Méga-Mouriès1850 Harvard Observatory takes 1st photograph of a star (Vega)