Boundary changes affecting the English county of Buckinghamshire.
Date  Legislation  Effect 

20 October 1844  Counties (Detached Parts) Act 1844^{[1]} 

25 March 1883  Local Government Board Order 19622^{[2]} 

24 March 1884  Local Government Board Orders 15986, 15987^{[2]} 

25 March 1885  Local Government Board Order 16585^{[2]} 

25 March 1888  Local Government Board Order 21701^{[2]} 

30 September 1895  Local Government Board Provisional Order 1170^{[2]}  
25 March 1896  Local Government Board Provisional Order Confirmation (No.14) Act^{[2]} 

1 October 1900  Local Government Board Order 41337 

1 April 1907  The Counties of Buckingham and Hertford (Alteration of County Boundaries) Order 1906 

1 April 1933  Ministry of Health Provisional Order Confirmation (Buckingham and Oxford) Act 1933  
5 June 1956  Ministry of Health and Local Government Declaration 

26 October 1956  Ministry of Health and Local Government Declaration 

21 December 1956  Ministry of Health and Local Government Declaration 

1 April 1965  The Counties of Bedford and Buckingham (LeightonLinslade) Order 1965 

1 April 1974  Local Government Act 1972 

1 April 1991  The Buckinghamshire, Hertfordshire, Northamptonshire and Oxfordshire (County Boundaries) Order 1991 

1 April 1991  The Bedfordshire, Buckinghamshire and Cambridgeshire (County Boundaries) Order 1991 

1 April 1995  The Berkshire, Buckinghamshire and Surrey (County Boundaries) Order 1994 

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✪ Determining Pi Terms (Buckingham Pi Theorem)

✪ Middlesex

✪ Dartmouth First Year Lecture: Mountains Beyond Mountains
Transcription
So this problem is an example of using the Buckingham Pi Theorem, which allows you to relate things in terms of dimensionless parameters. So in this particular problem we are going to look at a situation when a small pebbles is dropped into a liquid. When this happens small waves travel outward. The speed of these waves, which we are going to call C is assumed to be a function of the liquid density (rho), the wavelength, the wave height, and the surface tension of the liquid. So we have 5 variables C, rho, lambda, h, and sigma. We have 3 reference dimensions; M, L, and T. So 5 minus 3 equals 2. We should have 2 pi groups. So lets pick as our repeating variables. The first one we will pick is h because it is the simplest. You know that we cannot pick C because that is the variable that we are interested in. Once we have picked h, we can no longer pick lambda because lambda has the same dimensions L as h. So that leaves our repeating variables to be h, rho, and sigma okay. So now lets take a look at our pi 1. So our pi 1 is going to involve C, and then our repeating variables h, rho, and sigma. So lets look at their dimensions. C is L over T. Then L to the a, since that is what h is. M over L^3 to the b, which those are the dimensions of rho, and then M over T^2 to the c, because those are the dimensions of surface tension. This has to equal M^0*L^0*T^0. So lets first do a T balance. So 12c because that is where we get our T from, and it is on the bottom. Has to equal 0 in order for this to be dimensionless. So that allows us to solve for c. So c equals 1/2, and what that means in our pi group is that the variable that is represented by c, which is sigma is going to be raised to the 1/2 okay. Lets do M. So there is no M in the first term, but we have b plus c has to equal 0. Since we know that c is 0.5, b has to be positive 1/2. Finally we look at L. There is a 1 from the first term plus a from the second term, minus 3b from the 3rd term, nothing from the c term, and this has to be equal to 0. Since b is 1/2 when we solved a that ends up being 1/2, and so our pi 1 is going to equal our first term c, and now when we look at what a is, which is represented by h we see that is to the positive 1/2, so that is the square root of h. When we look at b that is to the positive 1/2. So that is rho divided by the square root of sigma. Again because it is negative 1/2. So on of the things that we have to absolutely have to do is check our dimensions to make sure that this is dimensionless. So we start with C, so that is L over T. h which is L is raised to the 1/2. Then rho which is M over L^3 is raised to the 1/2. So that is M to the 1/2, L to the 3/2. Now sigma, which is at the bottom, which is raised to the 1/2. So that is M on the bottom to the 1/2, and then T^2 to the 1/2 which is just T. If you take a look at this. These all cancel out, and this is dimensionless. So now lets look at our pi 2. So our pi 2 now is going to be to lambda, h, rho, and sigma. Lambda is L. We have h to the a, rho to the b, sigma to the c, and this has to equal M^0*L^0*T^0, and if we look by expectation, we see because there is no T except for the c term, that C has to equal 0, and if c is equal 0 then the only place that M appears is in the b term. So b equals 0. So that leaves us with a equals 1. Our pi 2 therefore is lambda over h. We write this as C the square root of h times rho divided by the square root of sigma equals some function that is what they use in the book of lambda over h.
Contents
List of places transferred from Buckinghamshire to Berkshire in 1974
 Britwell^{[note i]}
 Burnham (part)^{[note i]}
 Chalvey
 Cippenham
 Datchet
 Ditton
 Ditton Park
 Eton
 Eton Wick
 Horton
 Huntercombe
 Langley
 Salt Hill
 Slough
 Upton
 Wexham (part)^{[note i]}
 Wraysbury
Notes
† These areas were entirely detached from the remainder of Buckinghamshire.
‡ Detached part of Oxfordshire surrounded by Buckinghamshire
§ Detached part of Hertfordshire surrounded by Buckinghamshire
Note a: ^ The chapelry of Ackhampstead was a detached part of Oxfordshire within the Parish of Lewknor.^{[2]}
Note b: ^ The parish of Stratton Audley was partly in Buckinghamshire and partly in Oxfordshire until 1844.^{[2]}
Note c: ^ The hamlet of Studley formed part of the parish of Beckley, the remainder of which was in Oxfordshire.^{[2]}
Note d: ^ The extraparochial place of Luffield Abbey was partly in Buckinghamshire and partly in Northamptonshire. In 1844 the part in the latter county was transferred to the Northamptonshire parish of Silverstone so that Luffield Abbey was entirely within Buckinghamshire thereafter.^{[2]}
Note e: ^ The township of Boycott was part of the parish of Stowe, otherwise in Buckinghamshire.^{[2]}
Note f: ^ Part the hamlet of Coleshill was a detached part of Hertfordshire. The hamlet was part of the parish of Amersham, otherwise in Buckinghamshire.
Note g: ^ The remainder of Ivinghoe remained in Buckinghamshire.
Note h: ^ Linslade Urban District was merged with Leighton Buzzard Urban District in Bedfordshire, to form LeightonLinslade Urban District in the latter county.
Note i: ^ ^ The part of the parish of Wexham transferred to Berkshire was formed into a new parish of Wexham Court. The Britwell ward of Burnham parish was transferred to Berkshire to become the new parish of Britwell.^{[12]}
See also
References
 ^ Listed in Schedule M of the Parliamentary Boundaries Act 1832, 2&3 Will.4 c.64
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} ^{f} ^{g} ^{h} ^{i} ^{j} ^{k} ^{l} ^{m} ^{n} ^{o} ^{p} ^{q} ^{r} ^{s} ^{t} ^{u} ^{v} ^{w} ^{x} ^{y} Youngs, Frederic A, Jr. (1979). Guide to the Local Administrative Units of England, Vol.I: Southern England. London: Royal Historical Society. pp. 29–44. ISBN 0901050679.
 ^ Great Britain Historical GIS / University of Portsmouth, Edlesborough parish. Retrieved 20090909.
 ^ ^{a} ^{b} Great Britain Historical GIS / University of Portsmouth, Little Gaddesden parish. Retrieved 20090909.
 ^ Page, William (ed) (1925). Victoria County History of Buckinghamshire: Volume 3: Ibstone. pp. 62–65.CS1 maint: extra text: authors list (link)
 ^ ^{a} ^{b} Great Britain Historical GIS / University of Portsmouth, Bullington RD. Retrieved 20090909.
 ^ Great Britain Historical GIS / University of Portsmouth, Leighton Linslade UD. Retrieved 20090909.
 ^ ArnoldBaker, C. (1973). Local Government Act 1972. Butterworths.
 ^ ^{a} ^{b} ^{c} "The Buckinghamshire, Hertfordshire, Northamptonshire and Oxfordshire (County Boundaries) Order 1991". HMSO. 1991.
 ^ "The Bedfordshire, Buckinghamshire and Cambridgeshire (County Boundaries) Order 1991". HMSO. 1991.
 ^ "The Berkshire, Buckinghamshire and Surrey (County Boundaries) Order 1994". HMSO. 1994. Archived from the original on 20090202.
 ^ Local government in England and Wales: A Guide to the New System. London: HMSO. 1974. p. 170. ISBN 0117508470.