. Frost & fire : natural engines, tool-marks & chips : with sketches taken at home and abroad by a traveller. es,the hardened wax-stream floats, like ice in the polar sea. It carries sand, and contains air-bubbles ; it is a frozenconglomerate as glacier-ice is. Eeduce the heat and the model works slowly ; turn onthe gas and it works fiist. Sto]) the supply of wax and keepup the heat till the stream has passed away from the surface, LAND-ICE—MODELS AND SYMIiOLS. 177 and tlic tracks of the lialf-fVozeii stream wliicli moved overthe sand sunk int(j it, and flowed away ; the t()<tl-mark of tlie
. Frost & fire : natural engines, tool-marks & chips : with sketches taken at home and abroad by a traveller. es,the hardened wax-stream floats, like ice in the polar sea. It carries sand, and contains air-bubbles ; it is a frozenconglomerate as glacier-ice is. Eeduce the heat and the model works slowly ; turn onthe gas and it works fiist. Sto]) the supply of wax and keepup the heat till the stream has passed away from the surface, LAND-ICE—MODELS AND SYMIiOLS. 177 and tlic tracks of the lialf-fVozeii stream wliicli moved overthe sand sunk int(j it, and flowed away ; the t()<tl-mark of tliewax-engine will l)e found in the path which it made andfollowed from the peak A to the water-line —. Let the water yo, and it will carry off the wax-lloats AAA .Take the wax conglomerate, l)reak it and pile it on thetray once more, heat it to the melting-point of wax, and theheap will take a new shape. The melted wax hecomes aplane as water does ; the sand, freed from the cement whiclibound it, takes the conical form of moraines and rul»l)ish-heai)S shed from melting glaciers and stranded
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Keywords: ., book, bookcentury1800, booksubjectgeology, booksubjectmeteorology
