Remarks on Structure and Polymorphism in Boron BY J.L.Hoard 1
The Preparation of High-Purity Boron by Hot-Wire Tech-nipues By C.F.Powell，C.J.Ish，and J.M.Blocher，Jr 7
The Manufacture of Boron By G.H.Fetterly 15
Preparation of Boron from Boron Carbide By David R.Stern 27
Preparation of Crystalline Boron By J.Yannacakis and N.P.Nies 38
Various Preparations of Elemental Boron By R.C.Ellis，Jr 42
Utilization of Boron Filaments in Vapor-Phase Deposition of Boron By K.E.Bean and W.E.Medcalf 48
Growth of Boron Crystals by the Czochralski and Floating-Zone Methods By R.J.Starks and W.E.Medcalf 59
Zone Purification of Boron By F.H.Horn 70
Crystallography of the Aluminum Borides By J.A.Kohn 75
A New Modification of Elemental Boron By C.P.Talley，B.Post，and S.La Placa 83
Some New Rare Earth Borides By I.Binder，S.La Placa，and B.Post 86
Preparation and Properties of Massive Amorphous Ele-mental Boron By C.P.Talley，L.E.Line，Jr.，and Q.D.Overman，Jr 94
The Floating-Zone Melting of Boron and the Properties of Boron and Its Alloys By E.S.Greiner 105
Simple Rhombohedral Boron-Preparation and Properties By F.H.Horn 110
Observations on Boron and Some Borides By W.R.Eubank，L.E.Pruitt，and H.Thurnauer 116
Semiconductor Properties of Boron By A.K.Hagenlocher 128
Some Etching Studies on Boron By R.C.Ellis，Jr 135
Vector Hardness Properties of Boron and Aluminum Borides By A.A.Giardini，J.A.Kohn，L.Toman，and D.W.Eckert 140
Optical and Electrical Properties of Boron and Potential Application By G.K.Gaule，J.T.Breslin，J.R.Pastore，and R.A.Shuttleworth 159
Oxidation of Boron at Temperatures between 400℃ and 1300℃ in Air By H.F.Rizzo 175