div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentindexhtmlmdhistorymsamarylandgovmsasc3326scm8229pdf-duo-therm-oil-burninghtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: mdhistorynet indexhtmlmdhistorymsamarylandgovmsa_sc3326scm8229pdfDUO-THERM OIL BURNING HEATERS One of the finest heaters to be had Does away with ashes and dirt and gives loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader033fdocumentsusreader033viewer20220518055ff787d09e87a818f648f2ddhtml5thumbnails1jpg width=140 height=200 divdiv