iv CONTENTS. 
Mr. Witu1am Baxp’s Observations on the Tides in the Harbour of 
Glasgow, and the Velocity of the Tidal Wave in the Estuary of the 
River Clyde, between Glasgow and Port Glasgow .........ssseeeeeeeenees 
Rev. Professor KELLAND on the Theory of Waves..........sesesseserererers 
Mr. Suanp on the Agency of Sound ............scceeeesereeeeeeeeeeeeeeeeeens 
Mr. Granam ona Method of approximating to the Value of the Roots 
of Numerical Equations.......-..+-ssecsseesseeeeeeeeseeerseeeressessseasensenes 
Mr. Perstes on the Expressibility of the Roots of Algebraic Equations 
Mr. Fowxer’s new Calculating Machine .........s.secessncnenereneeeneweues 
Mr. Watsu on a Mode of solving Cubic Equations ............seseeeeeeee 
Mr. Wiii1aM Hoyue’s new Logarithmic Calculations and Views ...... 
Mr. P. MacFaruane on a new Construction of Barometer.........+.++++ 
Mr. Espy on the four daily Fluctuations of the Barometer .......++.++.+. 
Dr. ANDERSON on the Meteorology of Perth..........ssssecseeeeeeesenseens 
CHEMISTRY. 
Professor Toomas THomson on the most important Chemical Manufac- 
tures carried on in Glasgow and the neighbourhood .........+.sesseeee 
on the Minerals in the Neighbourhood of 
Glasgow ....csesseceeeccnreeccuseesaneeseusessoeesenesscesaessaeneceeeseesansceuens 
Dr. ScHAFHAEUTL on the Relation of Form to Chemical Composition 
—_—_—_ on anew Compound of Arsenious and Sulphuric Acids 
—____———— on a new Method of Photogenic Drawing ...........- 
Professor Lresic on Poisons, Contagions, and Miasms  ........++++s0ee 
Professor Gregory on the Pre-existence of Urea in Uric Acid ......... 
—_______——- on a. new Process for preparing Murexide............ 
on the Preparation of Alloxan, Alloxantine, Thio- 
nurate of Ammonia, Uramile, and Murexide ............csseeceeseseeeeees 
Dr. R. W. Giover’s Process for preparing Hydrobromic and Hydrio- 
dic. AGIOS. «cisssaeiccwacteacn vacacnanecsaidimadesWaisee pen Genes Jalan de abesucnmeemes 
Professor ANDREW Bucuanan on a Method of separating, by Filtra- 
tion, the Coagulable Lymph from Liquid Human Blood ............... 
Professor REDTENBACHER and Dr. Varrentrapp on the Constitution 
and Products of the Distillation of Fat Bodies .........s.sseseeeeeeeeeees 
Dr. L. Puayrarr on a New Fat Acid .......ccccesescscsscseeeecsceccssesesees 
Professor BuNsEN on a New Mode of estimating Nitrogen in Organic 
Analysis ...ccecceeneseseeeeseeseesenanneeseesecessaeeeeeeesenenaraanneesseseeeaeas 
~_————— on the Compound or Radical called Kakody] ......... 
Dr. Erruine on the Identity of Spiroilous and Saliculous Acid ......... 
Dr. Mour on a New Method of preparing Morphia and its Salts ...... 
Professor FREDERICK PENNY on the Action of Nitric Acid on the Chlo- 
rates, lodates, and Bromates of Potassa and Soda...........+ssss+sseee0s 
—_—_ on a New Salt obtained from Iodine and Caus- 
PIG SOMA. cccckacunaanaaqsascinicnminnaaindinla drlannelus sance Rtei mele MSls kiaiciet ose Sees 
Mr. ArtHuR Connex’s Additional Observations on the Voltaic De- 
composition of Alcohol .......sssessssseeeeeseseeeeeseeseeesererseneeeeeeannnens 
Professor JOHNSTON ON RESINS .......cscecsececseeececnecedecneasenerseeeeoens 
on the Resin of Sarcocolla ......ccsssceseseseeeeeeeee 
on some Varieties of Peat.......s.sesceeseereseeneeee 
Dr. CiarK on a Mode of Detecting Minute Portions of Arsenic......... 
Dr. R. D. THomson on the Tests for Sulphuric Acid when thrown on 
the (Pershore gscdanaaanhn seins ave lle sinila «nl scbabbideeuatedeantes hlaedstch URC ssi casted 
Mr. E. Sotzy on Bleaching Vegetable Wax .......csscccseeesscseeseenereees 
