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beliggende Vandlag. lldløsningen foregik enten ved Appar 
ratets Anslag mod Bunden eller i intermediære -Dyb ved 
et langs Linen nedsænket Lod. 
Ved Uddrivelsen af de i Våndet indeholdte Grasarter 
anvendte Jacobsen Bunsens Princip, idet Våndet kogtes i 
munication with the outside water. The detachment was 
effected either by the instrument striking the bottom, or, 
at intermediate depths, by running a weight down the line. 
For expelling the gas contained in the water, Jacob- 
sen made choice of Bunsen's method, boiling the water in 
et ved Vanddamp frembragt Vacuum, og construerede i 
Forbindelse med Dr. H. Behrens i dette Øiemcd et Appa- 
rat, som i Simpelhed og Paalidelighed Intet lader tilbage 
at ønske. Apparatet, som findes afbildet i Figur l, har 
af Jacobsen faaet følgende Beskrivelse : 
a vacuum created by steam ; and to meet the requirements 
of this process, he devised, with the assistance ot Dr. H. 
Behrens, an apparatus which in trustworthiness and sim- 
plicity of construction leaves nothing to be desired. This 
apparatus, of which a drawing is given in Fig. 1, Dr. 
Jacobsen has described as follows: — 
