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CROUP AND DiFETHEBIA IN THE LOWER ANIMALS.WE have received letters on this subject from Dr. George Johnson andMr. Fleming, the publication of which we are compelled to defer untilour next issue.

Mr. W. G. Burroughs.-If our correspondent will apply to Mr. CarstenHolthouse, 3, George-street, Hanover-square, we have no doubt he will- obtain the information he wants.

GOVERNMENT VACCINE.To the Editor of THE LANCET.

SIR,-I should like to know the opinion of my fellow-subscribers to THELANCET as to the value of the vaccine lymph received on application fromthe National Establishment. Having many times found that the resultsfollowing its use have been either negative or very slight compared with’those obtained from my own often imperfectly filled tubes, I might havepossibly attributed this to my want of expertness as a vaccinator ; but I feel,convinced that this is not the case, having heard similar complaints fromother practitioners. The tubes always appear thoroughly well filled, andthe matter of the clearest nature. One cannot help feeling glad to be ableto obtain a supply "gratis" in time of need; but it is disappointing attimes to meet with the result I have stated.-Yours obediently,

April 16th, 1875. A COUNTRY PUBLIC VACCINATOR.

ERRATUM.-In Mr. Franklyn’s letter on "Bone-setting," published in ourlast issue, page 597, line 20 from bottom of column, for " disease," readdisuse.

COMMUNICATIONS, LETTERS, &c., have been received from-Mr. T. Holmes,London; Dr. Geo. Johnson, London; Mr. Lister; Dr. Moxon, London;Dr. Wiltshire, London; Mr. Oliver Pemberton; Mr. Fleming, Chatham;Mr. Read, London; Dr. Richardson, Philadelphia; Dr. Broadbent, Lon-don ; Mr. Robinson, Dublin; Mr. Boger, London; Mr. Skerritt, London;Mr. Thornton, London; Dr. Hassall, Ventnor; Mr. Walker, St. Andrews ;Rev. G. B. Sayers, Dublin; Mr. Franklyn; Mr. Parkinson; Mr. Mackay,Sunderland ; Mr. Ayres, Greenwich; Mr. Balding ; Dr. Gairdner, Glasgow;Mr. Reeves; Dr. Carson, Coleraine; Mr. Piggott, Redcar ; Dr. Pierson,Dresden; Dr. Shearman, Rotherham; Dr. Blackwell, London; Dr. Jacobi,.New York ; Dr. Bishop, Edinburgh; Mr. Paul; Mr. Winchester, London ;Dr. Oliver, Boston, U.S.; Mr. Kirby Smith; Mrs. Cox; Mr. O’Connor,Chatteris; Mr. Reilly, Hackney; Mr. Lawson, Wakefield; Mr. Wilkins,Burton-on-Trent; Mr. Alexander, London; Dr. Cumming, Hastings;Rev. J. K. Bealey; Mr. Raines, C.B.; Dr. Mackintosh, Chesterfield ;Mr. Dix, Hull; Dr. Arnison, Newcastle-on-Tyne; Mr. Webber, London;Dr. Will, Aberdeen; Mr. Wynne, London; Mr. Carolan, Great Clacton;Mr. Freeman, London; Mr. Crowe, Hartlepool; Messrs. Ferris and Co.,Bristol; Dr. Muir, Ardrossan ; Messrs. Oliver and Boyd, Edinburgh;Dr. Mason, Sheffield; Mr. Young, Lesmahogan ; Mr. Jesse, Macclesfield ;Dr. Jennings, Potts Grove, U.S.; Dr. Beamish, Enniskean; Mr. Abbott,London; Mr. Toller, Barnstaple; Dr. Madge, London; Dr. Nicholas,Wandsworth; Mr. Morris, London; Mr. Reeves, London; Mr. Holden,Liverpool; Dr. Crow, Kildrummy; Mr. Sawyer, Birmingham; Mr. Fryer,Trowbridge; Mr. Simmons, Wotton-under-Edge; Mr. Anderson, Birken-’head ; Mrs. Richards, Redruth; Mr. Richardson, Battersea; Mr. Roberts,Bicton; Mr. Simpson, Cardiff; Mr. Smith, Sudbury; Mr. Gilligan, Man-chester; Mr. Horder, Wood Green; Mr. Hawkes, Launceston; Dr. Hall,Woolwich; Rev. W. Purton, London; Mr. Forward, Axminster; Mr. Trott,.Southsea; Mr. Davidson, Birkenhead; Dr. Bowstead, Caistor; Dr. Batho,Saugor, Central India; Dr. Alexander, Liverpool; Dr. Dowse, Holloway;Mr. Franklin, Newcastle ; Mr. Tzzylor, New. Seaham; Dr. Blandford,London; Messrs. Richardson and Co., Leicester; Mrs. Theobald, Leicester:Mr. Smith, Greenwich; Dr. Hemming, Abingdon; Messrs. Mead & Son,London; Beta; Inquisitive; A Country Vaccinator; Un Pauvre DiablePrudence; The Editor of the Liverpool Daily Post ; Fact; A VisitorAnxious; M.R.C.S.; W. B.; &c. &c.

LETTERS, each with enclosure, are also acknowledged from - Mr. EvansWest Bromwich; Mr. Pearce, Wisbeach; Mr. Baker, York; Mr. ErnstLondon; Mr. Edwards, Wandsworth-road; Mr. Hey, Leeds; Dr. Dougall’Glasgow ; Dr. Tate, Woodbridge; Mr. Cornish, Manchester; Mr. AndrewHaverstock-hill ; Mr. Gwynne, Dorchester; Messrs. Pearson and Co,

:Edinburgh; Mr. Legge, Aberdeen; Mr. Fawcett, Morebath; Dr. DavidsonAberdeen; Mr. Rumsey, Mere; Mr. Ormond, Wantage; Dr. Clegg, BacupMr. Barrett, Welshpool; Mr. Barling, Newnham; Mr. Dempsey, AldburyMr. Forsyth, Harrogate; Mr. Brett, Bridlington ; Mr. Brend, BusheyDr. Akerman, London; Mr. Highton, Brighton; Mr. Walker, CrickMr. Dewar, London ; Mr. Newington, Goudhurst ; Mrs. Bishop, BanburyMrs. Beath, Curragh; Mr. Doughty, Wollaston; Mr. Reilly, New CrossMr. Clayton, Leeds; Mr. Brodribb, Caterham; Mrs. Hunter, New Wand,,worth; Mr. Brendon, Hackney ; Mr. Lewis, Eastbourne ; Dr. Colemar’Wolverhampton; Mr. M’Gowan, Manchester; Mr. Morley, AddiscombeMr. Stuckey, London; Mrs. Mackey, Southampton; Dr. Curran, Mani,field; Dr. Peart, North Shields; Dr. Hogg, Margate; Mr. MulligaiLiverpool ; Mr. Morris, Liverpool; Mr. Williams, Abertillery; Mr. CoIIin!Wednesbury; Mr. Burroughs, Weston Zoyland; Dr. Hargreaves, SheffieldMessrs. Beaman and Johnston, Wigan ; Mr. Williams, London; A. B. CAberaman; X. Y. Z., London ; B. B., London ; A. B., Rugby.

Newcastle Daily Chronicle, Western Morning News, Leeds Mercury, SurreAdvertiser, Local Government Chronicle, East London Observer, ManchesterGuardian, Scotsman, Ludlow Advertiser, Chorley Standard, Cork Constitutiontion, Huddersfie7c? Chronicle, Isle of Man Times, Barrow Daily News, Susderland Echo, Macclesfield Courier, and Derbyshire Times have beereceived.

Medical Diary for the ensuing Week.Monday, May 3.

ROYAL LONDON OPHTHALMIC HOSPITAL, MOORFIELDS.-Operations, 10½ A.M.each day, and at the same hour.

ROYAL WESTMINSTER OpHTHALMio HOSPITAL.-Operations, 1 ½ P.M. each day,and at the same hour.

ST. MARK’S HOSPITAL.-Operations, 9 A.M. and 2 p.M.METROPOLITAN FREE HOSPITAL.-Operations, 2 P.M.ROYAL INSTITUTION.-2 P.M. General Monthly Meeting.ODONTOLOGICAL SOCIETY OF GREAT BRITAIN.-8 P.M.

Tuesday, May 4.Guy’s HOSPITAL.-Operations, 1 ½ P.M., and on Friday at the same hour.WESTMINSTER HOSPITAL.-Operations, 2 P.M.NATIONAL ORTHOPÆDIC HOSPITAL.-Operations, 2 P.M.WEST LONDON HOSPITAL.-Operations, 3 P.M.ROYAL INSTITUTION.-3 P.M. Prof. Gladstone, "On Chemical Force."PATHOLOGICAL SOCIETY OF LONDON. - 8a P.M. Adjourned Debate on the

" Germ Theory of Disease," being a discussion on the Relation ofBacteria and Allied Organisms to Virulent Inflammations and SpecificContagious Fevers :’

Wednesday, May 5.MIDDLESEX HOSPITAL.-Operations, 1 P.M.ST. MARY’S HOSPITAL.-Operations, 1 ¼ P.M.ST. BARTHOLOMEW’S HOSPITAL.-Operations, Ii P.M., and on Saturday at

the same hour.ST. THOMAS’S HOSPITAL.-Operations, 1 ½ P.M., and on Saturday at the same

hour.KING’S COLLEGE HOSPITAL.-Operations, 2 P.M., and on Saturday at 1 ½ P.M.GREAT NORTHERN HOSPITAL.-Operations, 2 P.M.UNIVERSITY COLLEGE HOSPITAL. - Operations, 2 P.M., and on Saturday at

the same hour.LONDON HOSPITAL.-Operations, 2 P.M.SAMARITAN FREE HOSPITAL FOR WOMEN AND CHILDREN -Operations, 2 ½ P.M.OBSTETRICAL SOCIETY OF LONDON.-8 P.M. Adjourned Discussion on th(

"Relation of Puerperal Fever to the Infective Diseases and Pysemia.’The debate will be resumed by Dr. Barnes.

ROYAL MICROSCOPICAL SOCIETY.-8 P.M. Mr. H. J. Slack, "On the Relation of Angular Aperture to Surface Markings and Accurate Vision."

Thursday, May 6.ST. GEORGE’S HOSPITAL.- Operations, 1 P.M.ROYAL ORTHOPÆDIC HOSPITAL.--Operations, 2 P.M.

’ CENTRAL LONDON OPHTHALMIO HOSPITAL.-Operations, 2 P.m., andouPrida3‘ at the same hour.

ROYAL INSTITUTION.-3 P.M. Prof. Seeley, "On the Fossil Forms of Flyinj. Animals."’ HARVEiAN SOCIETY of LONDON. - 8 P.M. Mr. Teevan, "On Urinary Affec’ tions of Children."

Friday, May 7.’ ST. GBORGB’S HOSPITAL.-Ophthalmic Operations, 1 ¼ P.M., ROYAL SOUTH LONDON OPHTHALMIC HOSPITAL.--Operations, 2 P.M.,

ItOYAL INSTITUTION.-8 P.M. Evening Meeting.-9 P.M. Prof. Cornu (Ecol,

Poly technique), "On the Velocity of Light."’ Saturday, May 8.’ ROYAL FRBB HOSPITA.L.-Operations, 9 A.M. and 2 P.M.; CRARING-CROSS HOSPITAL.-Operations, 2 P.M.; ROYAL INSTITUTION.-3 P.M. The Rev. Mark Pattison: "A Chapter of Un_ versity History."