Technikatörténeti szemle 10. (1978)

K. SCHMIDT Development of length measuring equipment the last 100 years 119 W. SCHREIER G. T. Fechner and psychophysical measurements 125 G. STULLER Development and tasks of measurement engineering in Czechoslovakia 131 F. SZABADVÁRY Measuring and calculation in chemistry 135 G. CS. SZABÓ Progress of the measurement methods in the economic sciences 141 J. SZEKERES History of the length unit 147 B. SZŐKE Shipyard cartwright caliper from the last century ... 153 GY. TÁLOS History of the development of reometry from Newton to our days 155 A. VALTCHEV

— Changes in the measuring systems of Bulgarian in the P. ATANASOVA middle of the 19th century 161 É. VÁMOS— Measuring units in the book-keeping of trading firms F. SZABADVÁRY in South-German cities in the 15th and 16th centuries 171 I. VERES History of the electronmicroscopic measurement of electric charges on a surface 181 L. VÉRTES— History of blood- and urinary sugar measurement I. ANGELI methods 183 I. WELLMANN Popular land-measuring methods in Hungary 187 E. W. WETTE The possibility of a definitive quantity-quality change from the history of measurment and of mathemacial trials as to a consistent synthesis of the nique substance in all motions 191 H. WITTHÖFT New perspectives in the Históriai Metrologie 197 H. J. WOTIZ— Milli Meter E. SIEGEL ... 207 E. ZÉTÉNYI Measuring instruments of the 200 years old "Specula" in Eger 209 R. E. ZUPKO English weights and measures: The historical evolution .. • • from Roman to metric standards 211 R. E. ZUPKO The Metric System in the United States

: From Debate to Conversation ...... 223 K. ZSDÁNSZKY— Metrology of ionizing radiations 231 J. HIZÓ P. FODOR— Atomic absorption in en viromental protection ....... 235 KERTAI M.

— L. POLOS