Popular science monthly . then control the growth. They creepalong the side of the aquarium, as if theywere idling away their time and merelycrawling around to call on their neigh-bors. In reality the\ are not dreamersbut scavengers. Nature hiis provided them with apeculiar anatomical structure resem-bling a narrow ribbon, which in detail islike the band of teeth on a carpentersrasp, lender the microscope these so-called lingual ribbons or tongues areseen to be thickly set with rows ofsharp-edged teeth which arc themselveslOfjthed and which rasp off microscopic])lants and carry them into the m
Popular science monthly . then control the growth. They creepalong the side of the aquarium, as if theywere idling away their time and merelycrawling around to call on their neigh-bors. In reality the\ are not dreamersbut scavengers. Nature hiis provided them with apeculiar anatomical structure resem-bling a narrow ribbon, which in detail islike the band of teeth on a carpentersrasp, lender the microscope these so-called lingual ribbons or tongues areseen to be thickly set with rows ofsharp-edged teeth which arc themselveslOfjthed and which rasp off microscopic])lants and carry them into the mouth. The accompanying illustration is froma marine form known as the blcoding-teeth snail. In the original the ribbonhas a bright reddish color as if it hadbeen dipped in blood. When the imageis thrown on the screen by the projectionmicroscope, it resembles a huge red raspthree or four feet in diameter and extend-ing across the entire width of the screen. Machines ThatSmoke Cigars The Modern Wayof Samplini?Tobacco Leaf m. THERE arc tea-tasters, perfume-smellcrs and silk-feelers, but whenit comes to smoking cigars to deter-mine their uniform burning, their ashcolor, and the aroma of the smoke thehuman element is entirely dispensed withand machines—cigar-smoking machinesthat can smoke four cigars at once andnever smoke themselves to death—areused. These are of two kinds. The cigarbuyers use asiniple blower outfit, and theBureau of Industry of the Depart-ment of Agriculture tests its tobacco leafwith an aspirator and siphon apparatus. When the buyers come to New Yorkfor their seasons supply of tobacco theytake the blower machine with them, andafter selecting certain (|ualities of tobaccohave cigars made u|) on tiic spot, c(5nncctthe blower to an ordinary lamp socket,insert the cigars and watch way the cigar burns, the colorof its ash and the aroma of the smokeare indications as to the quality anddesirability of that certain brand. The Bureau of Ilant Indust
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
