Om Materialprøvningens Udvikling i Norden
Og om Statsprøveanstaltens Virksomhed

gether 6 burners, in all burning about 1200 cub. ft. of gas in the hour. The experimental house being dried in keeping at last the burners faintly burning an experiment was made, where the fol- lowing temperatures were measured: Experiment begun at 1040 o’clock a. m. 114Ü — - - 730° C 1240 — p. m. 900 — |20 _ . 1000 — ■£40 - _ 1005 — 2°° _ _ _ 1025 — 920 - . 1075 — 240 — _ _ 1075 — • 300 — - - 1085—experim. interrupted. During an experiment made 2 days later a temperature of about 1000° Centigrade was reached after the course of 5 hours; an hour later the temperature had risen to 1100° Centigrade, which temperature was now kept constant for an hour, and then the experiment was interrupted. The temperatures were measured with Le Chatelier’s thermoelectric pyrometer during the ex- periment placed in one of the two horizontal iron-pipes visible in something more than half height on the photographs, the other being only used a few times to control whether the tempera- ture was the same on both sides of the transverse wall. The temperature measured was not maximum temperature, the tem- perature being apparently higher about 3 courses above the place of measuring. As it was to be presumed that the attained temperature of 1100° Centigrade was sufficiently high, and that this temperature had been kept constant for a proper time, the experiments were stopped, and one wall of the experimental house was broken down, that the effect produced in the bricks could be observed. The experimental house was broken down in such a way, that the wrong side of the transverse wall became visible, it being presumed that the effect produced in the bricks was observed easier here, because some of the bricks, being not of exactly the same length, projected somewhat here. P. 44 fig. 13 shows the ex- perimental house after the experiment, p. 45, fig. 14 and p. 46,