Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 53. (Budapest 1961)

Halász, M.: The microvegetation of the acrothermae of Harkány

Spring I ("Old Spring") Sodium hydrocarbonate NaHC0

3 0,5073 gr Calcium hydrocarbonate Ca (HC0

3

)

2 0,2298 gr Strontium hydrocarbonate Sr (HC0

3

)

2 0,0114 gr Manganese hydrocarbonate Mn(HC0

3

)

2 0,0061 gr Magnesium iodide MgJ

2 0,0013 gr Magnesium bromide MgBr

2 0,0018 gr Magnesium chloride MgCl

2 0,0496 gr Lithium chloride LiCl 0,0018 gr Potassium chloride KCl 0,0429 gr Sodium chloride NaCl 0,0835 gr Sodium metaborate NaB0

2 0,0099 gr Metasilicic acid H

2

Si0

3 , 0,0572 gr Organic materials 0,0145 gr Total 1,0164 gr Free carbon dioxide C0

2 = 12,6 cm

3 Carbon oxysulphide, solved in water, COS = 0,0202 gr = 5,71 cm

3 Gases emerging from the water, in a volume of : 100 = Carbon oxysulphide, COS 0,43 vol. Carbon monoxyde CO 1,65 vol. Hydrogen H 9,51 vol. Carbon dioxyde CO, 18,52 vol. Nitrogen N " 20,10 vol. Methane CH

d 49,71 vol. Total 100,000 vol. The chemical composition of Spring II closely agrees with this. There is only a slight difference in milligrams of the Potassium and Manganese content. As for the sulphur content, the spring group of Harkány is one of our richest sulphur springs in the country (Kunszt & Vámossy 1928 ; Csajághi 1956 ; Papp &L. Gaál 1956). Temperature and water output. The waters of the thermal springs of Harkány have the highest temperature among the natural hot springs with a large water output in Hungary. The temperature of Spring I is 62° C that of Springll is 62,6° C. It is a most important fact that the temperature and water output of the thermae of Harkány are unchanged since about 100 years, the same way as their chemical composition remained unchanged. The temperature of the hot springs of Harkány remains constant through the whole year, it is independent of weather conditions, indeed, it did not change during the long decades of scientific observations (since 1867, Cf. : Than 1869, C z i r á k y 1955). During my numerous observations, I found the same degree of temperature as K. Than in 1867. The most recent reports on water output also agree with those shown by V. Zsigmondy in 1866 andB. Zsigmondy in 1887. According to the measurements of K. E m s z t in 1927 (in : Harkány Gyógyfürdő leírása, Orsz. Orvosszövetség 1929. szept. 7—9. tartott Congressusa emlékére, Pécs), the water output, calculated for 24 hours, is 3.682 hl (Spring I), that is, 3,123 hi (Springll). Description of collecting sites. My microvegetational surveys were made, from 1947 till 1953, on six biotopes of the Baths of Harkány. I selected the six biotops with the point of view of being able to study the microvegetation in the biodynamic habitats of the thermal waters, free of any foreign pollution. The six biotopes are as follows : the sinks of Spring Wells I and II (Survey Sites I and II) ; the cooling basins (Survey Sites III, IV, and V), and the great mud basin (Survey Site VI).