communications of the "van der waals-fund" measurement of the viscosity of gases at high pressures; The viscosity of nitrogen to 1000 atms / A. Michels and R.O. Gibson mitteilungen des "van der waals-fonds" Zur Dispersionstheorie des Schalles / A.J. Rutgers communications of the "van der waals-fund" Isotherms of nitrogen between 0ÿê and 150ÿê and at pressures from 20 to 80 atm / A. Michels, H. Wouters and J. de Boer mitteilungen des "van der waals-fonds" Über Isothermen des Stickstoffes zwischen 0ÿê and 150ÿê bei drucken bis zu 400 atmosphären / J. Otto, A. Michels und H. Wouters communications of the "van der waals-fund" Isotherms of methane between 0ÿê and 150ÿêC and densities between 19 and 53 amagat (pressures between 20 and 80 atm) / A. Michels and G.W. … communications of the "van der waals-fund" influence of pressure on the electrical resistance of hard drawn gold wire in different stages of annealing and of soft gold wire / A. Michels … communications of the "van der waals-fund" Isotherms of ethylene between 0ÿê and 150ÿê and at pressures from 20 to 270 atm / A. Michels, J. de Gruyter and F. Niesen léon's rechtspraak Wet op de Grondbelasting, toegelicht uit hare geschiedenis, de administratieve en rechterlijke beslissingen, ministerieele voorschriften, literatuur enz Dertig jaar in de greep der Jehova-getuigen / W.J. Schnell ; [ten geleide van T. Delleman] Traité théorique et pratique de l'art de bâtir / J. Rondelet : Planches léon's rechtspraak begraafwet en de ziektewet, en de besluiten ter uitvoering van laatstgenoemde wet / door N. Cramer léon's rechtspraak Jacht en visserij / door N. Cramer